8-8-2018 RIO ALGAR ALTEA, ALICANTE - WESTERN SWAMPHEN (Porphyrio porphyrio)

The Western Swamphen, Porphyrio porphyrio, is a striking waterbird of the rail family Rallidae. Known also as the sultana bird, this species is adorned with vibrant plumage, large feet, and a distinctive red bill and frontal shield, making it a conspicuous presence in its natural habitat.

This chicken-sized bird can be identified by its bright plumage, which is typically purple-blue, and its red bill and frontal shield. The large feet of the Western Swamphen are another characteristic feature, aiding in its navigation through wetland vegetation.

The Western Swamphen is found in a variety of wetlands, including swamps, lake edges, and damp pastures. These environments provide the bird with the necessary resources for feeding and breeding.

The species is native to parts of the Western Palearctic, with populations in Spain, Portugal, southeastern France, Italy (notably Sardinia and Sicily), and northwestern Africa, including Morocco, Algeria, and Tunisia.

Despite its somewhat clumsy flight, the Western Swamphen is capable of flying long distances. It is also an adept swimmer, particularly for a bird without webbed feet. The species is known for its loud, quick calls, which include bleating and hooting sounds that are quite unbird-like in tone. These calls are especially prevalent during the breeding season.

The Western Swamphen's vocalizations are distinctive and varied, including loud and quick bleating and hooting calls. These sounds are an integral part of the bird's social and breeding behaviors.

Breeding typically occurs seasonally, with timing correlating with peak rainfall or summer in temperate regions. The Western Swamphen nests in warm reed beds, constructing large pads of interwoven reeds on floating debris or just above water level. Both sexes incubate the 3–6 speckled eggs for 23–27 days. Chicks are precocious, feathered with downy black plumage, and are able to leave the nest shortly after hatching, though they may remain for a few days before venturing out.

The diet of the Western Swamphen includes tender shoots and vegetable-like matter found within its wetland habitat. It also consumes eggs, ducklings, small fish, and invertebrates such as snails. There are reports of these birds attacking large eels, though it is not confirmed if eels are a regular part of their diet. They are known to use one foot to bring food to their mouth rather than eating it on the ground.

15-4-2018 CHOBE RIVER, NAMIBIA - AFRICAN ELEPHANT (Loxodonta africana)

The African bush elephant (Loxodonta africana), also known as the African savanna elephant, is a species of elephant native to sub-Saharan Africa. It is one of three extant elephant species and, along with the African forest elephant, one of two extant species of African elephant. It is the largest living terrestrial animal, with fully grown bulls reaching an average shoulder height of 3.04–3.36 metres (10.0–11.0 ft) and a body mass of 5.2–6.9 tonnes (11,000–15,000 lb); the largest recorded specimen had a shoulder height of 3.96 metres (13.0 ft) and an estimated body mass of 10.4 tonnes (23,000 lb). The African bush elephant is characterised by its long prehensile trunk with two finger-like processes; a convex back; large ears which help reduce body heat; and sturdy tusks that are noticeably curved. The skin is grey with scanty hairs, and bending cracks which support thermoregulation by retaining water.

The African bush elephant inhabits a variety of habitats such as forests, grasslands, woodlands, wetlands and agricultural land. It is a mixed herbivore feeding mostly on grasses, creepers, herbs, leaves, and bark. The average adult consumes about 150 kg (330 lb) of vegetation and 230 L (51 imp gal; 61 US gal) of water each day. A social animal, the African bush elephant often travels in herds composed of cows and their offspring. Adult bulls usually live alone or in small bachelor groups. During the mating season, males go through a process called musth; a period of high testosterone levels and heightened aggression. For females, the menstrual cycle lasts three to four months, and gestation around 22 months, the longest of any mammal.  

African elephants are members of the genus Loxodonta comprising two living elephant species, the African bush elephant (L. africana) and the smaller African forest elephant (L. cyclotis). Both are social herbivores with grey skin, but differ in the size and colour of their tusks and in the shape and size of their ears and skulls.

Both species are considered at heavy risk of extinction on the IUCN Red List; as of 2021, the bush elephant is considered endangered and the forest elephant is considered critically endangered. They are threatened by habitat loss and fragmentation, and poaching for the illegal ivory trade is a threat in several range countries as well.

Loxodonta is one of two extant genera of the family Elephantidae. The name refers to the lozenge-shaped enamel of their molar teeth. Fossil remains of Loxodonta species have been excavated in Africa, dating to the Middle Pliocene.

African elephants are distributed in Sub-Saharan Africa, where they inhabit Sahelian scrubland and arid regions, tropical rainforests, mopane and miombo woodlands. African forest elephant populations occur only in Central Africa.

The range of African elephants (Loxodonta africana) is patchily distributed across central and southern Africa in the Ethiopian Region. Remnant populations exist as far northwest as Guinea-Bissau and as far northeast as Ethiopia. Disjunct populations exist southward into northern South Africa, and include contiguous populations in Gabon, Tanzania, Botswana, and Zambia. Once present in Burundi, Gambia, and Mauritania, they've now been extirpated from those countries. These elephants were extirpated from Swaziland, as well, but have been re-introduced here in recent years.

African elephants are found in many habitats of Africa such as savannas, rain forests, woodlands, scrub forests, occasionally deserts, and beaches. However, due to poaching threats protected sanctuaries are their main habitats. Within these sanctuaries, these elephants will inhabit areas that have sources of water and abundant vegetation for foraging. Across these habitats, the elevation level ranges from sea level (0 meters) to 4000 meters.

15-4-2018 CHOBE RIVER, NAMIBIA - AFRICAN JACANA (Actophilornis africanus)

The African Jacana, Actophilornis africanus, is a distinctive wader known for its remarkable ability to traverse floating vegetation with its elongated toes and claws. This bird exhibits a striking chestnut plumage on its upperparts, complemented by black wingtips, rear neck, and an eyestripe. Adults boast a chestnut underpart, while juveniles display a white underpart with a chestnut belly patch. A blue bill, extending into a coot-like head shield, and grey legs and toes complete its unique appearance.

To identify the African Jacana, look for its long toes and claws, which are adapted for walking on lily pads and other floating vegetation. The adult's chestnut underparts contrast with the juveniles' white underparts and chestnut belly patch. The blue bill with a frontal shield and the bird's size, ranging from 23 to 31 cm in length, are also key identification features.

The African Jacana thrives in shallow lakes, where it can be seen gracefully walking on floating vegetation, a habitat it prefers and is uniquely adapted to inhabit.

This species enjoys a wide distribution across sub-Saharan Africa, where it is commonly found in suitable wetland habitats.

The African Jacana is sedentary, with some seasonal dispersion. It exhibits a polyandrous mating system, where a dominant female mates with multiple males. The males are solely responsible for incubating the eggs and rearing the chicks, showcasing remarkable adaptations for parental care, such as the ability to carry chicks under their wings.

Breeding occurs throughout sub-Saharan Africa. The African Jacana lays four brown eggs marked with black, in a nest that floats amidst the vegetation. The male takes on the role of incubating the eggs and caring for the young, a testament to the species' unique breeding system.

The diet consists primarily of insects and other invertebrates, which the African Jacana deftly picks from the water's surface or from the floating vegetation it frequents.

The IUCN Red List classifies the African Jacana as Least Concern, indicating that, currently, there are no immediate threats to its population levels.

15-4-2018 CHOBE RIVER, NAMIBIA - GIANT KINGFISHER (Megaceryle maxima ssp maxima)

The Giant Kingfisher, Megaceryle maxima, stands as Africa's largest kingfisher, boasting a length of 42–46 cm. It is adorned with a large, shaggy crest and a robust black bill. The plumage is characterized by fine white spots set against a black backdrop on the upperparts.

Males can be distinguished by a chestnut breast band and predominantly white underparts with dark flank barring. Females, on the other hand, display a white-spotted black breast band and a chestnut belly. The subspecies M. m. gigantea, found in forests, is darker, less spotted above, and exhibits more barring below than the nominate race.

The nominate subspecies, M. m. maxima, favors wooded savanna environments, while M. m. gigantea is more inclined towards tropical rainforests.

This resident breeding bird is widespread across most of Africa south of the Sahara Desert, with the exception of the arid southwest.

The Giant Kingfisher is monogamous and breeds solitarily. It is known for excavating long horizontal tunnels into river banks as nests, a task undertaken by both sexes.

Its vocalization is a distinctive and loud "wak wak wak."

Breeding seasons vary by region: in South Africa, it occurs from September to January; in Zimbabwe, from August to March; in Zambia, during March and April; and in Liberia, from December to January. The species lays a clutch of around three eggs in a chamber at the end of the tunnel, which can be impressively long, with records of up to 8.5 m.

The diet of the Giant Kingfisher consists mainly of crabs, fish, and frogs, which it catches by diving from a perch.

The Giant Kingfisher is currently classified as Least Concern on the IUCN Red List, indicating a stable population.

15-4-2018 CHOBE RIVER, NAMIBIA - GREATER KUDU (Tragelaphus Strepsiceros)

The Greater kudu (Tragelaphus strepsiceros) is a woodland antelope found in Africa. Despite occupying such widespread territory, Greater kudus are sparsely populated in most areas due to declining habitat, deforestation, and poaching.

Greater kudus have a narrow body with long legs, and their coats can range from brown/bluish-grey to reddish-brown. They possess between 4 and 12 vertical white stripes along their torso. The head is usually darker in color than the rest of the body and exhibits a small white v-shaped mark that runs between the eyes. Bulls tend to be much larger than cows, and vocalize much more; they also have beards running along their throats and large horns with two and a half twists.

The range of Greater kudu extends from the east in Ethiopia, Tanzania, Eritrea, and Kenya into the south where they are found in Zambia, Angola, Namibia, Botswana, Zimbabwe, and South Africa. Other regions where they occur are the Central African Republic, Chad, the Democratic Republic of the Congo, Djibouti, Malawi, Mozambique, Somalia, Swaziland, and Uganda. These antelopes live in mixed scrub woodlands and bush on abandoned fields and degraded pastures, mopane bush, and acacia in lowlands, hills, and mountains. They will occasionally venture onto plains only if there is a large abundance of bushes but normally avoid such open areas to avoid becoming an easy target for their predators.

15-4-2018 CHOBE RIVER, NAMIBIA - REED (LONG TAILED) CORMORANT (Microcarbo africanus)

The Reed Cormorant, also known as the Long-tailed Cormorant, is a diminutive member of the cormorant family Phalacrocoracidae. With an overall length of 50–55 cm and a wingspan stretching 80–90 cm, this bird presents a predominantly black plumage with a green gloss during the breeding season. Notably, it sports silvery wing coverts, a somewhat elongated tail, and a modest head crest. A distinctive red or yellow patch adorns its face, complemented by a yellow bill.

In breeding attire, the Reed Cormorant is resplendent in its glossy greenish-black plumage. The non-breeding adults and juveniles, however, exhibit a browner hue and a white underbelly. Some southern populations maintain their crest throughout the year. Both sexes are similar in appearance, making them indistinguishable in the field.

The Reed Cormorant is quite adaptable, making its home in a variety of freshwater wetlands and tranquil coastal environments.

This species is widespread and common, inhabiting inland and coastal regions across Sub-Saharan Africa and Madagascar. It is a resident bird, though it may engage in some seasonal movements.

An adept diver, the Reed Cormorant often forages in shallow waters, occasionally diving to impressive depths. It has a predilection for small, slow-moving fish with elongated bodies, such as mormyrids, catfishes, and cichlids, but will also consume soles, frogs, aquatic invertebrates, and occasionally small birds. Prey is typically brought to the surface before consumption.

The Reed Cormorant's nesting habits are quite private, with nests typically concealed by long grasses either in trees or on the ground. Clutches usually consist of two to four eggs.

The Reed Cormorant could potentially be confused with other cormorant species, but its smaller size, long tail, and the coloration of its face patch and bill are distinguishing features.

The diet of the Reed Cormorant is primarily piscivorous, focusing on fish that match its preferred size and shape. However, its diet can be quite varied depending on local availability.

15-4-2018 CHOBE RIVER, NAMIBIA - COMMON IMPALA (MALE) (Aepyceros melampus ssp. melampus)

The impala (Aepyceros melampus) is a medium-sized antelope that is found in Africa. It was first described to European audiences by German zoologist Hinrich Lichtenstein in 1812. Active mainly during the day, the impala may be gregarious or territorial depending upon the climate and geography. The impala is known for two characteristic leaps that constitute an anti-predator strategy.

Impala is an elegant and magnificent species of antelope. The animal has slender body with the identifying "M"-like marking on the rear. This medium-sized antelope possesses thin, pointed horns with tips, lying far apart from each other. Males of this species are identified by the characteristic "S"-like horns. The elegant limbs of these animals have scent glands behind the ankles. The overall coloration of their fur is red-brown with paler sides. In addition, they have black and white colored areas on their body. Thus, the tail, belly, chin, lips, inside ears as well as the lines above the eyes are colored with white. Meanwhile, black bands cover their thighs, tail, forehead and ear tips.

Impalas are distributed throughout the northeastern part of South Africa, Angola, southern Rwanda, Uganda, and Kenya. Close proximity to a water source is an important life condition for these animals. Generally, they prefer woodland with little undergrowth as well as low to medium-height grassland.

Impalas have polygynous mating system, where each male mates with a number of females. The period of peak breeding activity is March-May. During this period, pregnant females live in isolation to give birth. The gestation period lasts from 194 to 200 days, yielding a single calf, which weighs about 5kgs (11 lbs). After a few days, the calf and the female rejoin the herd. Then, after a while, the calf joins a crèche of other young impalas. They are weaned at 4-5 months old. Male impalas reach reproductive maturity at 1 year of age, while females are ready to breed when they are between 1 and 2 years old. Becoming reproductively mature, they, however, do not rush to establish territories. They typically start mating only at 4 years old.

These antelopes are both diurnal and nocturnal. They are most active just after sunrise and before sunset, socializing and moving with their herd, whereas, during the nighttime hours, impalas usually lie down and ruminate. Female impalas and their offspring gather into herds, containing from 15 to 100 individuals. The home range of each herd covers a territory, varying from 80 to 180 hectares. During the wet season, females become highly territorial, defending home ranges of their herds. On the other hand, young males form bachelor, non-territorial herds of up to 30 individuals. During the dry season, male and female herds can often be seen mixed together. Home ranges of mature breeding males vary from season to season. Thus, during the breeding season, they usually have smaller home ranges, which they fiercely defend. Males use a wide variety of methods to defend their home range, including fighting, tail-raising, chasing, roaring, erect posture as well as forehead marking and forehead rubbing.

15-4-2018 CHOBE RIVER, NAMIBIA - AFRICAN JACANA (Actophilornis africanus)

The African Jacana, Actophilornis africanus, is a distinctive wader known for its remarkable ability to traverse floating vegetation with its elongated toes and claws. This bird exhibits a striking chestnut plumage on its upperparts, complemented by black wingtips, rear neck, and an eyestripe. Adults boast a chestnut underpart, while juveniles display a white underpart with a chestnut belly patch. A blue bill, extending into a coot-like head shield, and grey legs and toes complete its unique appearance.

To identify the African Jacana, look for its long toes and claws, which are adapted for walking on lily pads and other floating vegetation. The adult's chestnut underparts contrast with the juveniles' white underparts and chestnut belly patch. The blue bill with a frontal shield and the bird's size, ranging from 23 to 31 cm in length, are also key identification features.

The African Jacana thrives in shallow lakes, where it can be seen gracefully walking on floating vegetation, a habitat it prefers and is uniquely adapted to inhabit.

This species enjoys a wide distribution across sub-Saharan Africa, where it is commonly found in suitable wetland habitats.

The African Jacana is sedentary, with some seasonal dispersion. It exhibits a polyandrous mating system, where a dominant female mates with multiple males. The males are solely responsible for incubating the eggs and rearing the chicks, showcasing remarkable adaptations for parental care, such as the ability to carry chicks under their wings.

Breeding occurs throughout sub-Saharan Africa. The African Jacana lays four brown eggs marked with black, in a nest that floats amidst the vegetation. The male takes on the role of incubating the eggs and caring for the young, a testament to the species' unique breeding system.

The diet consists primarily of insects and other invertebrates, which the African Jacana deftly picks from the water's surface or from the floating vegetation it frequents.

The IUCN Red List classifies the African Jacana as Least Concern, indicating that, currently, there are no immediate threats to its population levels.

15-4-2018 CHOBE RIVER, NAMIBIA - GREAT EGRET (Ardea alba)

The great egret, known scientifically as Ardea alba, is a majestic bird with a stately bearing and an impressive wingspan. This large egret is adorned with all-white plumage and can stand up to a meter tall. It is a cosmopolitan species, found across temperate and tropical regions worldwide.

To identify the great egret, look for its yellow bill and contrasting black legs and feet, which may vary slightly during the breeding season. During this time, the bill may darken, and the lower legs may lighten. The great egret also sports ornamental feathers on its back when in breeding plumage. Both sexes appear identical, and juveniles resemble nonbreeding adults. The great egret can be distinguished from the intermediate egret by the gape of its bill, which extends well beyond the back of the eye.

The great egret favors habitats close to water, such as large lakes with reed beds and other extensive wetlands. It nests in colonies, often at heights of 10 to 40 feet within trees.

This bird has a vast range, occurring worldwide in suitable habitats. It is particularly common across the Sun Belt of the United States and throughout the Neotropics.

The great egret is known for its slow, graceful flight with its neck retracted, a characteristic of herons and bitterns. It walks with its neck extended and wings held close. Generally silent, it may emit a low, hoarse croak when disturbed and a louder croaking at breeding colonies.

The great egret's vocalizations include a low croak when disturbed and various croaking and squawking sounds during the breeding season.

Breeding begins at 2-3 years of age with monogamous pairings. The male initiates nest building to attract a female. The nest is a sizable structure of sticks, lined with plant material. The species lays up to six bluish-green eggs, with both parents sharing incubation duties over 23-26 days. The young are fed by regurgitation and can fly within 6-7 weeks.

The great egret's diet consists of fish, frogs, small mammals, reptiles, crustaceans, and insects. It typically forages in shallow water, standing still or slowly stalking its prey before impaling it with its sharp bill.

15-4-2018 CHOBE RIVER, NAMIBIA - EGYPTIAN WHITE WATER LILY (Nymphaea lotus)

Nymphaea lotus, the white Egyptian lotus, tiger lotus, white lotus, or Egyptian water-lily, is a flowering plant of the family Nymphaeaceae.

It grows in various parts of East Africa and Southeast Asia. Nymphaea lotus var. thermalis was believed to be a Tertiary relict variety endemic to the thermal waters of Europe, for example, the Peţa River in Romania. DNA analysis has concluded that Nymphaea lotus var. thermalis lacks distinctiveness from Nymphaea lotus and therefore cannot be classified as a relic population.

It was introduced into Western cultivation in 1802 by Loddiges Nursery. Eduard Ortgies crossed Nymphaea lotus (N. dentata) with Nymphaea pubescens (N. rubra) to produce the first Nymphaea hybrid, illustrated in Flore des serres 8 t. 775, 776 under the name Nymphaea ortgiesiano-rubra. It is a popular ornamental aquatic plant in Venezuela.

It is a perennial, growing to 45 cm in height. The flower is white, sometimes tinged with pink.

15-4-2018 CHOBE RIVER, NAMIBIA - AFRICAN STONECHAT (Saxicola torquatus)

The African stonechat, Saxicola torquatus, is a small passerine bird of striking appearance. Males are characterized by their black heads, white half-collars, and black tails, with a pronounced white rump. Their wings are black with a conspicuous white patch. The upper breast is a vibrant orange-red, leading to a white or pale orange lower breast and belly. Females, on the other hand, display a more subdued palette with brown upper parts and a chestnut-buff underbelly, and less white on their wings.

When identifying the African stonechat, look for the male's distinctive black head with a white half-collar and the large white patch on the wings. The female is more cryptically colored but can be recognized by her paler eyebrow line and the buff-orange underparts. Both sexes exhibit a white rump that is particularly noticeable in flight.

This species is found across a variety of habitats in sub-Saharan Africa, from open grasslands to shrubby areas, often perching conspicuously on top of vegetation.

The African stonechat has a broad range across sub-Saharan Africa, extending locally to Senegal and Ethiopia. Isolated populations inhabit the mountains of southwest Arabia, Madagascar, and Grande Comore.

The African stonechat is a resident bird, showing little migratory behavior. It tends to stay within its range, moving only short distances if necessary. This has led to significant regional variation and the development of numerous subspecies.

The IUCN Red List classifies the African stonechat as Least Concern, indicating that the species does not currently face a significant risk of extinction.

15-4-2018 CHOBE RIVER, NAMIBIA - WHITE FACED WHISTLING DUCK (Dendrocygna viduata)

The White-faced Whistling Duck, Dendrocygna viduata, is a distinctive species with a long grey bill, elongated head, and relatively long legs. Its plumage is characterized by a black neck and head contrasted with a white face, which can vary in extent regionally. The back and wings are cloaked in dark brown to black, while the underparts are black with fine white barring on the flanks. A chestnut neck completes the ensemble. Both sexes are similarly attired, and juveniles resemble adults but with less pronounced head markings.

When identifying the White-faced Whistling Duck, look for the stark white face against a black head and neck. The species also has a distinctive three-note whistling call that can aid in identification even when the bird is not in sight.

These ducks favor freshwater lakes and reservoirs rich in vegetation, where they can forage for seeds and other plant-based food.

The White-faced Whistling Duck has a curious distribution, found in both sub-Saharan Africa and much of South America. It is thought that human activity may have contributed to their spread across these continents.

This species is known for its sociable nature, often forming large flocks. It is mostly sedentary, though it may undertake local movements of over 100 kilometers in response to environmental conditions.

Breeding sites are typically ground depressions or reed beds. Both sexes incubate the clutch of 6 to 12 eggs, which hatch after 26 to 28 days. The ducklings, with dark down above and yellow below, are tended by both parents and are usually concealed in reeds. They fledge at about two months of age.

The White-faced Whistling Duck is classified as Least Concern by the IUCN and is protected under the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA).

While the White-faced Whistling Duck is quite distinctive, it could potentially be confused with other whistling ducks. However, its unique facial coloration and call usually make it easily distinguishable.

The diet of the White-faced Whistling Duck primarily consists of seeds and other plant materials, which they forage from their aquatic habitats.

In the gentle light of dawn, one might observe the White-faced Whistling Duck, a creature of both beauty and intrigue, as it congregates in flocks that paint the sky with their synchronized flights and fills the air with their melodious calls.

15-4-2018 CHOBE RIVER, BOTSWANA - BLACK WINGED PRATINCOLE (Glareola nordmanni)

The Black-winged Pratincole, Glareola nordmanni, is a distinctive wader, part of the pratincole family, Glareolidae. It measures 24–28 cm in length, with a notable short-legged stature, elongated pointed wings, and a forked tail. Its back and head display a brown hue, while the wings contrast with brown and black flight feathers. The underbelly is white, and the underwings are a striking black.

To identify the Black-winged Pratincole, one must seek very good views, as it can be easily confused with other pratincoles like the Collared Pratincole or the Oriental Pratincole within its range. It is slightly larger than the Collared Pratincole, with shorter tail and longer legs. The dark underwing and absence of a white trailing edge on the wing are key identifiers, though these features can be elusive in the field. The chestnut underwing of the Collared Pratincole may appear black unless seen under excellent conditions.

This species is typically found in open landscapes and is often observed near bodies of water during the evening, engaging in its insect-hunting flights.

The Black-winged Pratincole graces the warmer regions of south-east Europe and south-west Asia. It is a migratory bird, spending winters in tropical Africa, and sightings are rare north or west of its breeding territories.

Breeding

The breeding behavior of the Black-winged Pratincole involves laying 2 to 4 eggs directly on the ground.

A unique aspect of pratincoles, including this species, is their aerial feeding habit, similar to swallows. They catch their insect prey mid-flight, although they are also capable of foraging on the ground.

The Black-winged Pratincole is currently classified as Near Threatened. It is one of the species protected under the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA). The discovery of the Acanthocephalan parasite Apororhynchus paulonucleatus in the intestine of this bird highlights the importance of ongoing research and conservation efforts.

15-4-2018 CHOBE RIVER, BOTSWANA - HIPPOPOTAMUS (Hippopotamus amphibius)

The hippopotamus (Hippopotamus amphibius; /ˌhɪpəˈpɒtəməs/; pl.: hippopotamuses), often shortened to hippo (pl.: hippos), further qualified as the common hippopotamus, Nile hippopotamus and river hippopotamus, is a large semiaquatic mammal native to sub-Saharan Africa. It is one of only two extant species in the family Hippopotamidae, the other being the pygmy hippopotamus (Choeropsis liberiensis or Hexaprotodon liberiensis). Its name comes from the Ancient Greek for "river horse" (ἱπποπόταμος).

After elephants and rhinoceroses, the hippopotamus is the next largest land mammal. It is also the largest extant land artiodactyl. Despite their physical resemblance to pigs and other terrestrial even-toed ungulates, the closest living relatives of the hippopotamids are cetaceans (whales, dolphins, porpoises, etc.), from which they diverged about 55 million years ago. Hippos are recognisable for their barrel-shaped torsos, wide-opening mouths with large canine tusks, nearly hairless bodies, short legs, and large size: adults average 1,500 kg (3,300 lb) for bulls (males) and 1,300 kg (2,900 lb) for cows (females).

Hippos inhabit rivers, lakes, and mangrove swamps. Territorial bulls each preside over a stretch of water and a group of five to thirty cows and calves. Mating and birth both occur in the water. During the day, hippos remain cool by staying in water or mud, emerging at dusk to graze on grasses. While hippos rest near each other in the water, grazing is a solitary activity and hippos typically do not display territorial behaviour on land. Hippos are among the most dangerous animals in the world due to their aggressive and unpredictable nature. They are threatened by habitat loss and poaching for their meat and ivory (canine teeth).

Hippopotamus amphibius arrived in Europe around 560–460,000 years ago, during the Middle Pleistocene. The distribution of Hippopotamus amphibius in Europe during the Pleistocene was largely confined to Southern Europe, including the Iberian Peninsula, Italy, and Greece, but extended into northwestern Europe, including Great Britain (as far north as North Yorkshire), the Netherlands, and western Germany during interglacial periods, such as the Last Interglacial (130–115,000 years ago). The youngest records of the species in Europe are from the Late Pleistocene of Greece, dating to around 40–30,000 years ago.

As of 2017, the IUCN Red List drawn up by the International Union for Conservation of Nature (IUCN) lists the species as vulnerable, with a stable population estimated between 115,000 and 130,000 animals. The hippo population has declined most dramatically in the Democratic Republic of the Congo. By 2005, the population in Virunga National Park had dropped to 800 or 900 from around 29,000 in the mid-1970s. This decline is attributed to the disruptions caused by the Second Congo War. The poachers are believed to be Mai-Mai rebels, underpaid Congolese soldiers, and local militia groups. Reasons for poaching include the belief hippos are harmful to society, as well as financial gain. As of 2016, the Virunga hippo population appears to have increased again, possibly due to better protection from park rangers, who have worked with local fishermen. The sale of hippo meat is illegal, but black-market sales are difficult for Virunga National Park officers to track. Hippo meat is highly valued in some areas of central Africa and the teeth may be used as a replacement for elephant ivory.

A population of hippos exists in Colombia, descended from captive individuals that escaped from Pablo Escobar's estate after his death in 1993. Their numbers grew to 100 by the 2020s and ecologists believe the population should be eradicated, as they are breeding rapidly and are an increasing menace to humans and the environment. Attempts to control them include sterilisation and culling.

15-4-2018 CHOBE RIVER, NAMIBIA - REED (LONG TAILED) CORMORANT (Microcarbo africanus)

The Reed Cormorant, also known as the Long-tailed Cormorant, is a diminutive member of the cormorant family Phalacrocoracidae. With an overall length of 50–55 cm and a wingspan stretching 80–90 cm, this bird presents a predominantly black plumage with a green gloss during the breeding season. Notably, it sports silvery wing coverts, a somewhat elongated tail, and a modest head crest. A distinctive red or yellow patch adorns its face, complemented by a yellow bill.

In breeding attire, the Reed Cormorant is resplendent in its glossy greenish-black plumage. The non-breeding adults and juveniles, however, exhibit a browner hue and a white underbelly. Some southern populations maintain their crest throughout the year. Both sexes are similar in appearance, making them indistinguishable in the field.

The Reed Cormorant is quite adaptable, making its home in a variety of freshwater wetlands and tranquil coastal environments.

This species is widespread and common, inhabiting inland and coastal regions across Sub-Saharan Africa and Madagascar. It is a resident bird, though it may engage in some seasonal movements.

An adept diver, the Reed Cormorant often forages in shallow waters, occasionally diving to impressive depths. It has a predilection for small, slow-moving fish with elongated bodies, such as mormyrids, catfishes, and cichlids, but will also consume soles, frogs, aquatic invertebrates, and occasionally small birds. Prey is typically brought to the surface before consumption.

15-4-2018 CHOBE RIVER, NAMIBIA - AFRICAN JACANA (Actophilornis africanus)

The African Jacana, Actophilornis africanus, is a distinctive wader known for its remarkable ability to traverse floating vegetation with its elongated toes and claws. This bird exhibits a striking chestnut plumage on its upperparts, complemented by black wingtips, rear neck, and an eyestripe. Adults boast a chestnut underpart, while juveniles display a white underpart with a chestnut belly patch. A blue bill, extending into a coot-like head shield, and grey legs and toes complete its unique appearance.

To identify the African Jacana, look for its long toes and claws, which are adapted for walking on lily pads and other floating vegetation. The adult's chestnut underparts contrast with the juveniles' white underparts and chestnut belly patch. The blue bill with a frontal shield and the bird's size, ranging from 23 to 31 cm in length, are also key identification features.

The African Jacana thrives in shallow lakes, where it can be seen gracefully walking on floating vegetation, a habitat it prefers and is uniquely adapted to inhabit.

This species enjoys a wide distribution across sub-Saharan Africa, where it is commonly found in suitable wetland habitats.

6-8-2018 VILLALONGA RESERVOIR, VALENCIA - LITTLE EGRET (Egretta garzetta)

There was a time when seeing a Little Egret in the UK was cause for celebration, but today they are much easier to spot. Read on to learn where you might find these elegant waterbirds.

Little Egrets are most at home in aquatic and coastal marine environments like estuaries, rocky shores, rivers, lakes, ponds and marshes. They will also feed in flooded terrestrial environments like farmlands.

Little Egrets are a very widespread species, occurring across much of Europe, Southern Asia, Australia, and Africa. In the UK, they are most common in Wales and the southeast coasts of England, although they are spreading inland and further north as far as Scotland.

Little Egrets spend most of their time walking on the ground or through shallow water. They also perch and roost in trees.

Little Egrets remain uncommon over much of the United Kingdom, although they are locally common in some areas. Their population is increasing, and their range has been expanding since they recolonised the British Isles in the 1980s.

Look for Little Egrets in any shallow water environment, particularly in the south and East of England. Norfolk is a popular place for birdwatchers to go and watch them in their natural habitat.

Humans have proved to be the greatest threat to the Little Egret, although these birds are a relatively rare example of a species making a comeback in the modern era.

Little Egrets live for an average of five years, although some individuals have survived for over twenty years.

6-8-2018 VILLALONGA RESERVOIR, VALENCIA - EPAULET SKIMMER DRAGONFLY (MALE) (Orthetrum chrysostigma)

Another pruinose Skimmer species, said to be one of Africa’s most common dragonflies, that has made it up into Spain.

Orthetrum chrysostigma, the epaulet skimmer, is a species of dragonfly in the family Libellulidae. It is found in Algeria, Angola, Benin, Botswana, Burkina Faso, Cameroon, Central African Republic, Chad, the Democratic Republic of the Congo, Ivory Coast, Egypt, Equatorial Guinea, Ethiopia, Gambia, Ghana, Guinea, Israel, Kenya, Liberia, Libya, Malawi, Mali, Mauritania, Morocco, Mozambique, Namibia, Niger, Nigeria, Senegal, Sierra Leone, Somalia, South Africa, Sudan, Tanzania, Togo, Uganda, Zambia, Zimbabwe, and possibly Burundi as well as Canary Islands, and Portugal. It was recorded in the Maltese Islands in 2010.

Its natural habitats are subtropical or tropical moist lowland forests, dry savanna, moist savanna, subtropical or tropical dry shrubland, subtropical or tropical moist shrubland, rivers, intermittent rivers, shrub-dominated wetlands, swamps, freshwater lakes, intermittent freshwater lakes, freshwater marshes, intermittent freshwater marshes, and freshwater springs. The adults prey on various flying insects. The bodies of adult males are blue, and those of young and females are yellow and brown.

6-8-2018 VILLALONGA RESERVOIR, VALENCIA - BLUE TAILED DAMSELFLY (Ischnura elegans)

The blue-tailed damselfly or common bluetail (Ischnura elegans) is a damselfly, belonging to the family Coenagrionidae.

These damselflies can be found in a wide range of lowland environments, with standing and slow flowing waters, brackish and polluted water.[4]

Ischnura elegans can reach a body length of 27–35 millimetres (1.1–1.4 in) and a wingspan of about 35 millimetres (1.4 in). Hindwings reach alength of 14–20 millimetres (0.55–0.79 in).[5] Adult male blue-tailed damselflies have a head and thorax patterned with blue and black. There is a bi-coloured pterostigma on the front wings. Eyes are blue. They have a largely black abdomen with very narrow pale markings where each segment joins the next. Segment eight, however, is entirely pale blue. At rest, the wings of most damselfly species are held back together, unlike dragonflies, which rest with their wings out flat. The thorax of juvenile males has a green tinge.

Female blue-tailed Damselflies come in a variety of colour forms. Juveniles may be salmon pink, form rufescens; violet, form violacea and a pale green form. The colour darkens as the damselfly ages. Mature females may be blue like the male, form typica; olive green thorax and brown spot, form infuscans or pale brown thorax and brown spot, form infusca-obseleta.

Adults fly from April to September to early October. The adult damselflies prey on small flying insects, caught using their legs like a basket to scoop the prey up while flying, or insects taken from leaves. Damselfly nymphs are aquatic, and prey on small aquatic insects or other aquatic larvae.

A male can try to interfere with a mating pair, by attaching itself to the mating male. The females always lay their eggs on the floating parts of the plants without any involvement of the male.

Blue-tailed Damselflies are superb fliers and can alter each of their four wing's kinematics in order to maneuver. A recent study has shown that they can compensate for a whole wing loss and even successfully maneuver and catch prey.

In damselfly populations, there is often a surplus of males displaying male mate harassment. In order to avoid unwanted mating attempts, females have developed polymorphisms that allow some of them to avoid recognition by males by mimicking male phenotypes. There are three specific morphs found in the Ischnura elegans species: androchromes, aurantiaca(rufescens) and infuscans. The androchromes resemble the male coloration, and the gynochromes, which can be either aurantiaca or infuscan, do not resemble males. The aurantiaca female morph is a pink-orange color with a blue abdominal patch that eventually disappears after maturation. The third morph, infuscan, displays an olive-green coloration with no color on its abdominal patch. Females are able to fully mature into their differing morph colorations just a few days after they finish their transition from aquatic larvae to their mature forms.

Although having an increased number of morphs makes it more difficult for males to distinguish between males from females, the levels of male mate harassment is different between the different morphs. Males primarily rely on visual cues to distinguish between the morphs and can also use odour cues, secondarily. Androchromes are often seen to face less male mate harassment because they resemble males and are less desired.  This gives androchromes an advantage in that they are able to spend more time allowing their eggs to mature instead of exerting energy avoiding unwanted mating attempts. Along with that, the morphs also display different mate avoidance tactics. Androchromes are more likely to face off with males by spreading their wings and curling their abdomens while gynochromes tend to fly away to avoid mating. Despite potentially having more time for egg maturation, the androchromes are still disadvantaged because their abdomens, like males, are more narrow which prevents them from being able to carry as many eggs as gynochromes.

There are also five main hypotheses that attempt to understand how the different female polymorphisms are continually maintained in this species. The reproductive isolation hypothesis states that there is a greater predation pressure on androchromes, which is seen as a trade-off to maintain the more inconspicuous morph. The male-mimicry hypothesis, mentioned previously, proposes that the androchromes ability to mimic male coloration allows them to avoid unwanted mating attempts and allocate more time to egg maturation. The density-dependent hypothesis states that the maintenance of the polymorphisms is attributed to the changing population densities. The habituation hypothesis states that males are actually most attracted to the morph that is most abundant. Lastly, the neutral hypothesis proposes that the female morphs are maintained by genetic drift, mutations, and founders effect all working together as well as that they might be more neutral to selection.

13-4-2018 CHOBE RIVER, NAMIBIA - WIRE TAILED SWALLOW (Hirundo smithii)

The wire-tailed swallow (Hirundo smithii) is a small passerine bird in the swallow family. It has two subspecies: H. s. smithii, which occurs throughout Africa, and H. s. filifera, which is found in southern and southeastern Asia. It is mainly resident, but populations in Pakistan and northern India migrate further south in winter. The genus name Hirundo is the Latin word for swallow. The species name smithii commemorates Christen Smith, a Norwegian botanist and geologist.

The wire-tailed swallow, Hirundo smithii, is a diminutive and agile passerine, a member of the swallow family. It is adorned with a lustrous blue plumage on its upperparts and a stark white on the underparts. A chestnut cap crowns its head, adding a touch of warmth to its appearance. The species is particularly noted for its elongated outermost tail feathers, reminiscent of fine wires trailing in flight. These distinctive "wires" are more pronounced in males than in females.