Tuesday, 2 March 2021
17-4-2018 CHOBE RIVER, BOTSWANA - BLACK HERON (Egretta ardesiaca)
The black heron, also known as the black egret, is a medium-sized bird, cloaked in an alluring black plumage that is complemented by a similarly hued bill and contrasting yellow feet. During the breeding season, it adorns itself with elegant long plumes that grace its crown and nape, adding to its mystique.
To identify the black heron, look for its distinctive black coloration and yellow feet. The bird stands between 42.5 to 66 cm tall and weighs approximately 0.27 to 0.39 kg. The breeding plumage, with its extended plumes on the head and neck, is particularly noteworthy.
The black heron is partial to shallow open waters, where it can be found along the edges of freshwater lakes and ponds. Its habitat also extends to marshes, riverbanks, rice fields, and seasonally flooded grasslands. In coastal regions, it frequents tidal rivers, creeks, alkaline lakes, and tidal flats.
This species is patchily distributed throughout Sub-Saharan Africa, from Senegal and Sudan down to South Africa, with a strong presence on the eastern half of the continent and in Madagascar. There have been occasional sightings in Greece and Italy.
The black heron is renowned for its unique hunting method known as canopy feeding, where it creates a shade with its wings to lure fish—a behavior that has captivated audiences in documentaries. It can feed solitarily or in groups, sometimes amassing in numbers up to 200. These herons are diurnal feeders with a preference for dusk and roost communally at night. Coastal flocks are known to roost at high tide.
Adept at fishing, the black heron's diet primarily consists of small fish, but it will also consume aquatic insects, crustaceans, and amphibians to satisfy its nutritional needs.
The black heron nests at the onset of the rainy season, either alone or in mixed-species colonies that can number in the hundreds. Its nests are constructed from twigs and are situated over water in trees, bushes, or reed beds. The eggs are described as dark blue, and a typical clutch comprises two to four eggs.
17-4-2018 CHOBE RIVER, BOTSWANA - WHITE HEADED LAPWING (Vanellus albiceps)
The White-crowned Lapwing, also known as the White-headed Lapwing, White-headed Plover, or White-crowned Plover, is a medium-sized wader that presents a striking appearance. Its upper body is adorned with a brown back, while the wings and tail exhibit a bold black and white pattern. The underparts are a clean white. The head is particularly distinctive with a grey base, a brilliant white crown, and a white foreneck. Adding to its unique visage are the yellow eyering, facial wattles, and legs. Both sexes and juveniles share a similar plumage, making them indistinguishable in the field.
When attempting to identify the White-crowned Lapwing, look for the unmistakable combination of its white crown, grey head, and the contrasting black and white patterns on its wings and tail. The yellow eyering and wattles are also key features that aid in its identification.
This species is typically found in tropical Africa, favoring habitats near large rivers. It thrives in areas where sand or shingle is exposed, providing suitable breeding grounds.
The White-crowned Lapwing is a resident bird throughout tropical Africa, maintaining a presence year-round near its preferred riverine environments.
The White-crowned Lapwing is known for its breeding behavior, where it lays 2-3 eggs in a ground scrape near rivers. It is fiercely protective of its nest and young, defending them with vigor against any potential threats, regardless of size. Outside of breeding season, it is common to see these birds feeding in small flocks, where they forage for insects and other small invertebrates.
17-4-2018 CHOBE RIVER, BOTSWANA - 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.
Greater kudus are social animals that live in groups within their home areas. Females usually form small groups of 6-10 with their offspring, but sometimes they can form a herd of up to 20 individuals. Male kudus may form small bachelor groups, but they are more commonly found as solitary and widely dispersed individuals. Solitary males will join the group of females and calves only during the mating season. Home ranges of maternal herds can overlap with other maternal herds while home ranges of adult males generally encompass the ranges of two or three female groups. Greater kudus may be active throughout the 24-hour day. During the day, they normally cease to be active and instead seek cover under woodland, especially during hot days. They feed and drink in the early morning and late afternoon, acquiring water from waterholes or roots and bulbs that have high water content. When a herd is threatened by predators, an adult (usually female) will issue a bark to alert the rest of the herd. Greater kudus communicate using many other vocalizations, including low grunts, clucks, humming, and gasping.
Monday, 1 March 2021
1-3-2021 PUERTO DE GANDIA, VALENCIA - EURASIAN GREAT CORMORANT (Phalacrocorax carbo)
The great cormorant (Phalacrocorax carbo), also known as just cormorant in Britain, as black shag or kawau in New Zealand, formerly also known as the great black cormorant across the Northern Hemisphere, the black cormorant in Australia, and the large cormorant in India, is a widespread member of the cormorant family of seabirds. It breeds in much of the Old World, Australasia, and the Atlantic coast of North America.
The great cormorant was formally described in 1758 by the Swedish naturalist Carl Linnaeus in the tenth edition of his Systema Naturae under the binomial name Pelecanus carbo. Linnaeus specified the type location as "Europe", but this was restricted to the "rock-nesting form of the north Atlantic Ocean" by the German ornithologist Ernst Hartert in 1920. The great cormorant is now one of 12 species placed in the genus Phalacrocorax that was introduced in 1760 by the French zoologist Mathurin Jacques Brisson. The genus name is Latinised Ancient Greek, from φαλακρός (phalakros, "bald") and κόραξ (korax, "raven"); the specific epithet carbo is Latin for "charcoal".
This is a very common and widespread bird species. It feeds at sea in inshore waters, in estuaries, and on freshwater lakes and rivers. Northern birds migrate south to escape waters that freeze in winter, moving to any coast or freshwater that is unfrozen and well-supplied with fish; in warmer areas, birds disperse locally. They only rarely cross larger bodies of water such as the North Sea.
The type subspecies, P. c. carbo, is found mainly in Atlantic waters and nearby inland areas, on northwestern European coasts, the Faroe Islands, Iceland and Greenland, and on the northeastern seaboard of North America. The widespread continental subspecies P. c. sinensis occurs on most of mainland Europe and east across the Palearctic to Siberia and southeastern Asia. The subspecies P. c. novaehollandiae is found in Australian and New Zealand waters.
The great cormorant nests in colonies near wetlands, rivers, and sheltered inshore waters. Pairs will use the same nest site to breed year after year. It builds its nest, which is made from sticks, in trees, on the ledges of cliffs, and on the ground on rocky islands that are free of predators. They lay a clutch of three to five eggs that measure 63 by 41 millimetres (2+1⁄2 by 1+5⁄8 in) on average. The eggs are a pale blue or green, and sometimes have a white chalky layer covering them. These eggs are incubated for a period of about 28 to 31 days.
The great cormorant feeds on fish caught through diving. Birds at the Chausey Islands feed primarily on wrasses, but also takes sand smelt, flathead and common soles. The average weight of fish taken by great cormorants increases with decreasing air and water temperature. Cormorants consume all fish of appropriate size that they are able to catch in summer and noticeably select for larger, mostly torpedo-shaped fish in winter. In winter, the foraging efficiency described for cormorants by various researchers is increased by capturing larger fish, not due to capturing more fish. In some freshwater systems, the take of fish by overwintering great cormorants was estimated to be up to 80 kg per ha per year (e.g. Vltava River, Czech Republic).
It forages by foot-propelled diving and capturing its prey in its beak. The duration of its dives varies from 1–3 minutes, with the bird diving to depths of up to a maximum of 9.5 metres (31 ft). About 60% of dives are to the benthic zone and about 10% are to the pelagic zone, with the rest of the dives being to zones in between the two. Studies suggest that their hearing has evolved for underwater usage, possibly aiding their detection of fish. These adaptations also have a cost on their hearing ability in air which is of lowered sensitivity.
Many fishermen see in the great cormorant a competitor for fish. Because of this, it was hunted nearly to extinction in the past. Due to conservation efforts, its numbers increased. At the moment, there are about 1.2 million birds in Europe (based on winter counts; late summer counts would show higher numbers). Increasing populations have once again brought the cormorant into conflict with fisheries.For example, in Britain, where inland breeding was once uncommon, there are now increasing numbers of birds breeding inland, and many inland fish farms and fisheries now claim to be suffering high losses due to these birds. In the UK each year, some licences are issued to cull specified numbers of cormorants in order to help reduce predation; it is, however, still illegal to kill a bird without such a licence.
Sunday, 28 February 2021
17-4-2018 CHOBE RIVER, BOTSWANA - EGYPTIAN GOOSE (Alopochen aegyptiaca)
The Egyptian goose, Alopochen aegyptiaca, is a striking bird, native to Sub-Saharan Africa and the Nile Valley. It is a member of the Anatidae family, which includes ducks, geese, and swans. This species is unique in its appearance, resembling a goose more than a duck when in flight, with a heavy and robust stature. Adults typically measure between 63 to 73 centimeters in height.
Both sexes of the Egyptian goose display identical plumage, though males are generally larger. Plumage tones can vary from grey to brown, not necessarily indicative of age or sex. Mature birds boast a significant white patch on their wings, concealed by wing coverts when at rest but prominently displayed when the bird is agitated or in flight.
The Egyptian goose favors open or semi-open environments, often found near freshwater sources. Its habitat ranges from lowlands to high altitudes, such as the Ethiopian Highlands, up to 4,000 meters above sea level. It avoids dense forests and deserts.
This species is widespread and common in its native range, though numbers have dwindled in the northern Nile Valley. Historically found in southeastern Europe and parts of the Middle East, its presence in these areas has diminished.
The Egyptian goose is largely terrestrial, capable of perching on trees and buildings. It is known for its aggressive territorial behavior, especially during breeding season, and is not hesitant to engage in aerial combat with intruders. The species is monogamous, with both parents caring for their offspring.
The male's call is a subdued, hoarse quack, becoming louder and more rapid when agitated, resembling a steam engine. The female's quack is raucous and frequently heard, particularly when defending her young.
Nesting occurs in a variety of locations, with a preference for holes in mature trees. Both parents incubate the eggs, and the young are capable of foraging for themselves shortly after hatching.
Egyptian geese primarily consume seeds, leaves, grasses, and plant stems. They may also eat small animals such as locusts and worms. Goslings initially feed on small aquatic invertebrates before transitioning to grazing.
The Egyptian goose is classified as Least Concern by the IUCN, indicating a stable population. However, in regions where it has been introduced, it is considered invasive and may pose a threat to native species.
17-4-2018 CHOBE RIVER, BOTSWANA - 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 African Jacana might be confused with the Madagascar Jacana, which is similar in size. However, the latter is geographically isolated to Madagascar, reducing the likelihood of confusion within the African Jacana's range.
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.
27-2-2021 ADOR CAMPO, VALENCIA - EUROPEAN SERIN (MALE) (Serinus serinus)
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The European serin, or simply the serin (Serinus serinus), is a diminutive member of the finch family, Fringillidae. This sprightly bird is the smallest within its family, closely related to the Atlantic canary. It is characterized by its short tail and a length that spans a mere 11 to 12 centimeters. The serin's plumage is a tapestry of nature's palette, with upper parts dappled in dark-streaked greyish green and a conspicuous yellow rump. The underparts are a canvas of yellow breast and white belly, both adorned with heavy streaks.
When attempting to identify the European serin, look for the male's radiant yellow face and breast, which stand out against the greenish backdrop of its feathers. The male also boasts yellow wing bars and yellow tail sides, which can be quite helpful in distinguishing it from similar species. Both sexes share a buzzing trill of a song that resonates through their Mediterranean habitats.
The European serin is partial to open woodland and cultivated areas, often with a sprinkling of conifers. These environments provide the perfect backdrop for breeding and foraging.
Saturday, 27 February 2021
27-2-2021 ADOR CAMPO, VALENCIA - LONG HEADED POPPY (Papaver dubium)
Papaver dubium is a species of poppy known by the common names long-headed poppy and blindeyes. It is an annual species which prefers sandy soils without lime. It is native to Europe, North Africa and south-western Asia and widespread as an introduction in America and elsewhere.
Papaver dubium is a variable annual, growing to about 60 cm in height. It generally flowers in late spring to mid-summer. The flower is large (30–70 mm) and showy, with four petals that are lighter red than in the similar Papaver rhoeas, and most commonly without a black spot at the base. The flower stem is usually covered with coarse hairs that are closely appressed to the surface, helping to distinguish it from P. rhoeas in which the hairs are more usually patent, held at right angles to the stem. The capsules are hairless, elongated to more than twice as tall as they are wide, tapering slightly at the tip, with a stigma generally less wide than the capsule. The plant exudes white to yellowish latex when the tissues are broken. The species can form a long-lived soil seed bank that can germinate when the soil is disturbed.
27-2-2021 MONTE CORONA, VALENCIA - SARDINIAN WARBLER (FEMALE) (Sylvia melanocephala)
The Sardinian warbler, Curruca melanocephala, presents itself as a charming and distinctive bird of the Mediterranean. The males are adorned with a sleek grey back and pristine whitish underparts, crowned with a striking black head, a pure white throat, and captivating red eyes. The females, on the other hand, exhibit a more subdued palette, with brown upperparts and buff underparts, complemented by a subtle grey head.
When attempting to identify the Sardinian warbler, look for the male's black head and red eyes, which contrast with the white throat and grey back. Females can be recognized by their brown and buff coloration with a greyish head. The variability in plumage, including the presence or absence of a reddish hue, can be a helpful clue in distinguishing between subspecies.
This typical warbler favors open landscapes and cultivated areas, where it can find bushes suitable for nesting. Its preference for such environments makes it a familiar sight in the Mediterranean countryside.
The Sardinian warbler is a resident of the southernmost regions of Europe, extending its range into Asia in Turkey and the eastern Mediterranean. While not extensively migratory, some individuals do venture to North Africa for the winter, and the species has been known to appear as a vagrant as far as Great Britain.
The breeding habits of the Sardinian warbler involve the construction of nests in low shrubbery, where the female lays a clutch of eggs that both parents will tend to.
The Sardinian warbler is part of a superspecies complex, which includes Menetries's warbler and the eastern subalpine warbler. These species share certain characteristics, such as white malar areas and light throats in males, but can be differentiated by other plumage features and their distinct calls.
Primarily insectivorous, the Sardinian warbler supplements its diet with berries and other soft fruits, particularly when insects are less abundant.
The Sardinian warbler is currently listed as Least Concern by the IUCN, indicating that, for now, this species does not face any imminent threats to its survival.
Friday, 26 February 2021
26-2-2021 DESEMBOCADURA RIO ALGAR, ALTEA - WILD RADDISH (Raphanus sativus)
Wild Radish (Raphanus sativus) is an escaped cultivated plant and annual herb in the mustard family (Brassicaceae). Native to southeastern Asia and the Mediterranean, it is widespread in disturbed areas, roadsides, and agricultural fields. The entire plant is edible, featuring a slender, often woody taproot and a peppery flavor.
Key Plant Facts & Characteristics
Flowers & Petals: Flowers have four distinct petals that grow in a cross shape, commonly white, pale pink, lavender, or purple. The petals typically have prominent, dark-veined structures.
Leaves: Large, basal, and deeply lobed with bristly hairs. When crushed, the leaves and stems release a distinct, radish-like aroma.Seed Pods: Unlike common grocery-store radishes, wild radish produces elongated, jointed, and slightly spongy seed pods that resemble small string beans.
Edibility: All parts of the plant are edible. Young leaves can be used in salads, while the flowers and young seed pods make excellent raw garnishes or stir-fry ingredients.I
nvasive Tendencies: Although it was introduced globally as a crop, its rapid germination often allows it to outcompete native vegetation, making it an invasive environmental and agricultural pest in many regions (like Australia and California).
Relationship with Raphanus raphanistrum: Raphanus sativus frequently hybridizes with its close wild relative R. raphanistrum, complicating exact field identification. R. sativus often has pink-purple petals, whereas R. raphanistrum tends to feature yellow petals.
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