14-8-2017 AMSTERDAM ZOO, NETHERLANDS - BLACK HEADED WEAVER (Ploceus melanocephalus)

The village weaver (Ploceus cucullatus ), also known as the spotted-backed weaver or black-headed weaver (the latter leading to easy confusion with P. melanocephalus ), is a species of bird in the family Ploceidae found in much of sub-Saharan Africa. It has also been introduced to Portugal as well as to the islands of Hispaniola, Martinique, Puerto Rico, Mauritius and Réunion.

This often abundant species occurs in a wide range of open or semi-open habitats, including woodlands and human habitation, and frequently forms large noisy colonies in towns, villages and hotel grounds. This weaver builds a large coarsely woven nest made of grass and leaf strips with a downward facing entrance which is suspended from a branch in a tree. Two to three eggs are laid. Village weavers are colonial breeders, so many nests may hang from one tree.

Village weavers feed principally on seeds and grain, and can be a crop pest, but it will readily take insects, especially when feeding young, which partially redresses the damage to agriculture. The calls of this bird include harsh buzzes and chattering.The Black-headed Weaver, known scientifically as Ploceus melanocephalus and also referred to as the Yellow-backed Weaver, is a striking member of the Ploceidae family. The breeding male is particularly distinctive with its bold black head and contrasting yellow nuchal collar, a feature that sets it apart from its relatives, the Juba and Golden-backed Weavers.

During the breeding season, the male Black-headed Weaver can be identified by its black head and the bright yellow collar gracing the nape of its neck. The mantle is a plain, greenish hue, and the underparts are a pale yellow, often infused with varying degrees of chestnut. Females and non-breeding males lack the black head and are more easily confused with the female Masked Weaver, though they can be distinguished by their dark eyes, darker bill, and buffy breast plumage.

The Black-headed Weaver is typically found in savannas and similar environments, often in proximity to water sources. It has a particular affinity for Acacia trees, which it uses for nesting, usually situated about 3 meters from land to deter predators.

This species is native to West, Central, and East Africa. It has also expanded its range to the Iberian Peninsula, where it has been introduced.

The Black-headed Weaver is known for its elaborate nesting behavior, often constructing its nest in Acacia trees to provide a measure of safety from ground predators.

The vocalizations of the Black-headed Weaver are an integral part of its breeding display, with the male often singing to attract a mate.

The breeding male's plumage is a key aspect of its courtship display, with the black head and yellow collar playing a significant role in attracting females. It is also known for its elaborate nesting behavior, often constructing its nest in Acacia trees to provide a measure of safety from ground predators.

The Black-headed Weaver can be confused with the Juba Weaver, Golden-backed Weaver, and the Village Weaver. However, its plain greenish mantle and the chestnut tinges on its underparts, along with the absence of a yellow nuchal collar in the Juba and Golden-backed Weavers, help in distinguishing it from these similar species.

Village weavers forage and roost in large groups, often with other weaver species. In some areas, they move periodically along fixed routes. The birds look for food on the ground, but also look up to search vegetation and trees. The village weaver nests in colonies and is very active during the breeding season. Birds fly in and leave again constantly, making a lot of noise. Colonies can contain as many as 150 nests, but anything between eight and a hundred nests in a single tree is usual.

A village weaver's nest is 14–17 cm (5.5–6.7 in) long and 11–13 cm (4.3–5.1 in) high. The entrance is mostly extended into a tube of 4–8 cm (1.6–3.1 in) long. The male weaves the structure of the nest using long strips of leaf, that he has torn from palms or large grass species such as Arundo donax. The nest is roofed, ovoid or kidney-shaped, internally consisting of a nesting chamber that is separated by a ground sill from an antechamber, that has the entrance of the entire nest at the bottom. On the inside, the ceiling is made of strips of grass or other leaves, which are simply inserted instead of woven-in. The floor on the inside is lined by short, thatched strips of palm, grass blades or heads, and feathers. The nest requires about three hundred long strips of leaf, which the male tears off and transports one by one. The male gathers building material throughout the building process, during which he works with his feet in exactly the same position, and maintaining the same orientation. He starts by creating the attachment by weaving around mostly two hanging branches just below a fork, a foot on both of them, which he includes in a ring he constructs by weaving in the plain of the branches at the edge of his reach. He than extends the high end of the ring in front of its head, gradually working towards his feet creating a half-globe, that is the nesting chamber. The male continues by constructing the roof of the antechamber, working over his head. This is followed by lining the ceiling, and constructing the entrance tube, hanging upside-down, but still with his feet at the same spots. The weaving technique consists of seizing a strip of near the end and double the strip back on itself. Next he pokes the end with a vibrating movement in between his previous work until it sticks. He then release it, moves his head to the other side of the nest wall, seizes the strip again and pokes it in somewhere. He keeps repeating this, regularly reversing the direction in which he weaves the strip, poking and pulling the strip through holes until the entire length is used. The female collects material too, but she occupies herself only with the lining of the nesting cup.

14-8-2017 AMSTERDAM ZOO, NETHERLANDS - NORTHERN BALD IBIS (Geronticus eremita)

The Northern Bald Ibis, also known as the Hermit Ibis or Waldrapp (Geronticus eremita), is a striking bird with a glossy black plumage that exhibits bronze-green and violet iridescence. It stands out with its unfeathered red face and head, and a long, curved red bill. This bird measures 70–80 cm in length, with a wingspan of 125–135 cm, and weighs between 1.0 and 1.3 kg. Unlike many ibises, it does not wade but instead forages on land.

Adults are easily identified by their bare red face and head, long red bill, and glossy black feathers. In flight, the Northern Bald Ibis has a distinct profile with less rounded wings and a shorter neck compared to other ibises. Its legs are relatively short, so its feet do not extend beyond the tail in flight. Juveniles have a dark head, grey legs, and a pale bill, with red areas developing as they mature.

The Northern Bald Ibis favors open landscapes such as grasslands, rocky habitats, and semi-deserts, often near running water. It nests on coastal or mountain cliff ledges, away from the trees and wetlands preferred by other ibis species.

Historically widespread across the Middle East, northern Africa, and southern and central Europe, the Northern Bald Ibis has vanished from most of its range. Today, the majority of the wild population is found in southern Morocco, with reintroduction programs in Europe and a semi-wild colony in Turkey.

This bird is known for its gregarious nature, forming flocks that commute to feeding areas. It breeds in colonies, with pairs that mate for life. The Northern Bald Ibis is migratory in parts of its range, with some populations traveling significant distances between breeding and wintering grounds.

At breeding colonies, the Northern Bald Ibis produces guttural "hrump" and high, hoarse "hyoh" calls. Outside of these areas, it is generally silent.

Breeding occurs on cliff ledges or boulders, where the ibis lays two to four eggs in a stick nest. Both parents incubate the eggs and care for the chicks, which fledge after 40–50 days. The species starts breeding at three to five years of age.

The Southern Bald Ibis (G. calvus) can be distinguished by its whitish face. The Glossy Ibis (Plegadis falcinellus) is similar in dark plumage but is smaller and has a different flight profile.

The Northern Bald Ibis has a varied diet, primarily consuming lizards and beetles, but also small mammals, birds, and various invertebrates. It forages in flocks, using its bill to probe the soil for food.

The Northern Bald Ibis is classified as Endangered on the IUCN Red List. Its population has declined due to hunting, habitat loss, and other human-related factors. Conservation efforts, including protection of breeding sites and reintroduction programs, have helped stabilize some populations.

14-8-2017 AMSTERDAM ZOO, NETHERLANDS - VIOLET TURACO (Musophaga violacea)

The violet turaco, also known as the violaceous plantain eater (Musophaga violacea ), is a large turaco, a group of African otidimorphae.

Spectacular purple turaco with a beautiful facial pattern: a large red-and-yellow bill, red bare skin around the eye, a white patch behind the eye, and a dark red back of the head. Shows large crimson wing patches in flight. Found along forest edge and in gallery forests and lush gardens. Acts like a typical turaco, bouncing through the trees and flying occasionally with short bursts of wingbeats and long glides. Call is a low, rollicking trill that is often given in raucous chorus by a group. Similar to Ross's Turaco, but overlap in range is minimal, and Violet is easily separated by many details of its facial pattern, including its two-colored bill.

These are unmistakable birds, but shy and often inconspicuous in the treetops. They are approximately 48 cm (19 in) long, including a long tail and a 4 cm (1.6 in) bill. They boast a winglength of 21 cm (8.3 in) and weigh approximately 360 g. The plumage is glossy violet, except for the yellow forehead, chestnut crown and white ear coverts; the bill is thick and red. In flight, the violet turaco's crimson primary flight feathers contrast with the violet plumage. The red colour in the wings is typical of turacos.

It is resident in West Africa, and has an extremely large range from Senegal through to the Nigeria, with an isolated population in Chad and Central African Republic. It occurs in tropical savannas, wetlands, woodlands and forests.

Turacos are social birds, travelling in flocks of around ten to twelve individuals. They are not strong fliers but they can run quickly through the branches. Violet turaco has a loud cooroo-cooroo call.

Diet consists of fruit, and they are quite partial to figs, but they will also eat leaves, buds, flowers, insects, snails and slugs.

Cooperative breeding behavior has been observed in captivity in this species. The female lays two eggs in a flimsy tree platform nest.

This species is locally common, but is vulnerable to trapping for the pet trade in Guinea, Sierra Leone, Liberia and Ghana.

14-8-2017 AMSTERDAM ZOO, NETHERLANDS - LILAC BREASTED ROLLER (Coracias caudatus)

The lilac-breasted roller (Coracias caudatus) is a member of the roller family, Coraciidae, resplendent in a panoply of pastel hues. This African bird is a sight to behold, with its lilac throat and breast, olive crown to mantle, and cheeks of lilac-rufous. The species is further adorned with long, black tail streamers, which juveniles lack. Unofficially, it is considered the national bird of Kenya.

In the field, the lilac-breasted roller is almost unmistakable. Adults boast a lilac throat that deepens into a darker lilac breast, with an olive crown and mantle. The cheeks and ear coverts are a lilac-rufous. Juveniles and immatures can be identified by their lack of tail streamers and a throat and breast of rufous-tawny with broad diffuse buffy-white streaks. The species is not sexually dimorphic, though males may be slightly larger.

The lilac-breasted roller favors open woodland and savanna, typically avoiding treeless expanses. They are often seen perched high, surveying the landscape for prey.

This species is widely distributed across Southern and Eastern Africa and is a vagrant to the southern Arabian Peninsula. It is most abundant in Kenya and can be found from sea level to elevations of 2,000 meters or more.

Lilac-breasted rollers are usually solitary or found in pairs. They are known for their aggressive defense of their nests against raptors and other birds. During the breeding season, males perform acrobatic flights, swooping and diving while emitting harsh cries.

Their diet consists of arthropods and small vertebrates, including insects, spiders, scorpions, and small birds. They hunt from perches, swooping down to catch prey on the ground or in the air.

Lilac-breasted rollers are active during the day and are usually found alone or in pairs. They perch conspicuously at the tops of trees, poles, or other high vantage points from where they can spot insects, lizards, or other prey moving about on the ground. Lilac-breasted rollers hunt from a perch and scout from a higher vantage point (including from atop large herbivorous mammals) before swooping in and grabbing prey with their beaks. If their prey is small, they will swallow it on the ground. These aggressive birds will carry larger prey back to a perch and beat it until it is dismembered. Outside of protected areas such as national parks, Lilac-breasted rollers may often be seen when farmers burn land for agricultural use. Such brush fires stir up insects and other invertebrates, and birds can be seen swooping in for easy prey. In East Africa, they join other perch hunters like Taita fiscals and Pale flycatchers to make opportunistic use of grassland fires. In South Africa, they are also seen in association with kites, storks, swallows, and bee-eaters when the burning of firebreaks drives small animals onto roads. The call of these acrobatic fliers is a harsh, sawing 'rak rak rak' that is given during flight. They also produce loud raucous calls during flight displays and will perch to sing.

Lilac-breasted rollers are monogamous birds believed to mate for life. Pairs nest solitary and are protective of their nest and one of the pair will fly in a rolling pattern as a territorial display against intruders or distract nest predators. During courtship, a Lilac-breasted roller will fly upwards and then tip forward with the wings closed, before flapping to gain speed towards the ground. While leveling out at the highest speed the bird will roll to the left and right a few times, uttering a harsh, raucous 'kaaa, kaarsh', before swooping up again. The display may end with a harsh chuckling. The breeding season occurs at various times of the year, depending on the location; in Somalia, these birds breed from late April to mid-September. They build flat nests of grass in a baobab, dead coconut, casuarina, or Terminalia tree. The nest is situated in a hollowed-out tree cavity some 5 meters (16 ft) off the ground, or even on the side of a termite mound. Lilac-breasted rollers do not create the cavities themselves but take over nest spaces that have been previously hollowed out by woodpeckers or kingfishers. Females lay 2-4 eggs per breeding season and both partners will take turns incubating the eggs for 22 to 24 days. Hatchlings are born altricial (helpless), becoming fully feathered after 18-20 days. They will remain dependent on their parents for up to another month and will be ready to breed at the age of 2 years.

14-8-2017 AMSTERDAM ZOO, NETHERLANDS - BURROWING OWL (Athene cunicularia)

The Burrowing owl (Athene cunicularia) is a small, long-legged owl found throughout open landscapes of North and South America. Unlike most owls, these owls are often active during the day, but like many other kinds of owls, though, they do most of their hunting during dusk and dawn, when they can use their night vision and hearing to their advantage. Living in open grasslands as opposed to forests, the burrowing owl has developed longer legs that enable it to sprint, as well as fly, when hunting.

Burrowing owls have bright eyes and their beaks can be dark yellow or gray depending on the subspecies. They have prominent white eyebrows and a white "chin" patch which they expand and display during certain behaviors, such as a bobbing of the head when agitated. Adults have brown heads and wings with white spotting. The chest and abdomen are white with variable brown spotting or barring, also depending on the subspecies. Juvenile owls are similar in appearance, but they lack most of the white spotting above and brown barring below; their breast may be buff-colored rather than white.

Burrowing owls range from the southern portions of the western Canadian provinces through southern Mexico and western Central America. They are also found in Florida and many Caribbean islands. In South America, they are patchy in the northwest and through the Andes but widely distributed from southern Brazil to Patagonia and Tierra del Fuego. Burrowing owls are year-round residents in most of their range. Birds that breed in Canada and the northern U.S. usually migrate south to Mexico and the southern U.S. during winter months. These owls inhabit grasslands, rangelands, agricultural areas, deserts, or any other open dry area with low vegetation.

Burrowing owls spend most of their time on the ground, and may breed in loose colonies. They nest and roost in burrows, such as those excavated by prairie dogs. Unlike most owls, Burrowing owls are often active during the day, although they tend to avoid the midday heat. However, most of their hunting is done from dusk until dawn, when they can use their night vision and hearing to their advantage. When hunting, Burrowing owls wait on a perch patiently until they spot prey. Then, they swoop down on prey or fly up to catch insects in flight. Sometimes, they walk, hop, or chase prey on foot across the ground. When not hunting Burrowing owls sleep at their burrow entrances or on depressions in the ground. The rest of the time is spent stretching, preening, and bathing in a puddle and the birds will also take a dust bath in a shallow depression in the dirt. Disturbed Burrowing owls bob jerkily up and down and can scream, cluck, and chatter when defending the nest. Their main call is a mellow 'coo-coooo' and a song 'co-hoo' that can usually be heard at night.

14-8-2017 AMSTERDAM, NETHERLANDS - EURASIAN GREAT CORMORANT (Phalacrocorax carbo)

The great cormorant (Phalacrocorax carbo), a robust seabird, is cloaked in predominantly black plumage. It is a member of the cormorant family, with a widespread distribution. The species exhibits considerable size variation across its range, with males generally larger than females. Notable features include a longish tail and a distinctive yellow throat-patch. During the breeding season, adults boast white patches on their thighs and throat.

To identify the great cormorant, look for its large size, heavy build, and thick bill. It lacks a crest and its plumage does not have a green tinge, distinguishing it from the common shag. In North America, it is bulkier than the double-crested cormorant and has less yellow on the throat and bill. The white thigh patches are a key identifier.

Great cormorants are found in a variety of aquatic environments including seas, estuaries, freshwater lakes, and rivers. They often nest in colonies close to these water bodies.

This species has a broad distribution, breeding across the Old World, Australia, and the Atlantic coast of North America. Northern populations tend to migrate southward in winter, seeking coasts rich in fish.

Great cormorants are generally silent but may emit guttural noises at breeding colonies. They are known for their wing-drying posture, often seen with wings outstretched to dry after diving.

Mostly silent, the great cormorant vocalizes with guttural sounds in the vicinity of its breeding colonies.

Great cormorants typically nest in colonies near wetlands, rivers, or sheltered inshore waters, often returning to the same site annually. Their nests are constructed from sticks and can be located in trees, on cliff ledges, or on predator-free ground. They lay clutches of three to five pale blue or green eggs, which are incubated for about 28 to 31 days.

These birds are piscivorous, diving to catch fish such as wrasses, sand smelt, flathead, and common soles. They exhibit seasonal dietary shifts, preferring larger fish in colder temperatures. Their foraging efficiency is influenced by the size of the prey rather than the quantity.

The great cormorant is currently listed as Least Concern by the IUCN. Conservation efforts have led to a population rebound, with approximately 1.2 million birds in Europe alone. However, their increasing numbers have led to conflicts with fisheries due to predation on fish stocks.

14-8-2017 AMSTERDAM ZOO, NETHERLANDS - BLACK SWAN (Cygnus atratus)

The black swan (Cygnus atratus) is a striking large waterbird, native to the southeastern and southwestern regions of Australia. It is characterized by its predominantly black plumage and a distinctive red bill, with a pale bar and tip. The legs and feet are a greyish-black hue. Males, known as cobs, are marginally larger than females, or pens, and possess a longer, straighter bill. Juveniles, referred to as cygnets, display a greyish-brown coloration with pale-edged feathers.

Adult black swans range from 110 to 142 centimeters in length and weigh between 3.7 and 9 kilograms. Their wingspan stretches from 1.6 to 2 meters. Notably, they have the longest neck relative to body size among swans, which is typically curved into an elegant "S" shape.

Black swans inhabit a variety of wetland environments, including fresh, brackish, and saltwater lakes, as well as swamps and rivers with abundant underwater and emergent vegetation. They are also found in permanent wetlands and ornamental lakes, and may occasionally venture into flooded pastures, tidal mudflats, or the open sea near islands or the coast.

Within Australia, black swans are common in the wetlands of the southwest and east, and their range extends to adjacent coastal islands. They are nomadic birds, with migration patterns influenced by climatic conditions, such as rainfall or drought.

14-8-2017 AMSTERDAM ZOO, NETHERLANDS - GREAT WHITE PELICAN (Pelecanus onocrotalus)

The great white pelican, known scientifically as Pelecanus onocrotalus, is a gargantuan bird, surpassed in size only by its cousin, the Dalmatian pelican. With a body length ranging from 140 to 180 cm and a wingspan stretching from 226 to 360 cm, it is one of the largest flying birds. The pelican's bill is an impressive 28.9 to 47.1 cm long, colored in hues of pink and yellow, and is accompanied by a pale-yellow gular pouch. Males are generally larger than females and exhibit a pronounced sexual dimorphism, with males averaging more than 30% heavier than females.

Adult great white pelicans are predominantly white with black flight feathers and a faint pink tinge on the neck. The bill is bluish-grey with a red tip and a yellowish gular pouch. During the breeding season, males display pinkish facial skin, while females exhibit a more orangey hue. Juveniles are distinguishable by their darker, brownish underparts and patterned underwings.

These pelicans favor shallow, warm freshwater environments, such as lakes, swamps, and lagoons, often with dense reed beds nearby for nesting. They are also found in coastal estuarine areas and occasionally at elevations up to 1,372 m in East Africa and Nepal.

The great white pelican breeds from southeastern Europe through Asia to Africa. It is a migratory species with populations found from Eastern Europe to Kazakhstan during the breeding season. In Africa, it is resident south of the Sahara Desert.

The great white pelican is a highly sociable bird, often forming large flocks. It is an adept swimmer and an elegant flier, known for its soaring flight with occasional slow wingbeats followed by glides. These birds are cooperative feeders, often foraging in groups.

This species is mostly silent but can emit a variety of low-pitched calls, including a deep, quiet croak in flight and deep "moooo" calls at breeding colonies.

Breeding occurs in large colonies with nests varying from stick nests in trees to ground scrapes lined with grass and other materials. The female lays 1 to 4 eggs, with incubation lasting 29 to 36 days. Chicks fledge at 65 to 75 days of age, with sexual maturity reached at 3 to 4 years.

The great white pelican can be confused with the Dalmatian pelican, which has greyish-white plumage and a fully feathered face. The spot-billed and pink-backed pelicans are smaller and have different plumage and bill colors.

Their diet consists mainly of fish, with daily requirements ranging from 0.9 to 1.4 kg. They feed cooperatively, using their pouches to scoop up water and fish, then contracting the pouch to drain the water and retain the fish. They may also opportunistically consume other birds' chicks and, in some cases, have been observed eating pigeons.

The great white pelican is listed as Least Concern on the IUCN Red List. It is protected under various international agreements and occurs within numerous Important Bird Areas and Special Protection Areas. However, it faces threats from overfishing, habitat loss, and human disturbance.

14-8-2017 AMSTERDAM, NETHERLANDS - GREY HERON (Ardea cinerea)

The Grey Heron (Ardea cinerea) is a statuesque wading bird belonging to the family Ardeidae. It is a familiar sight in both rural and urban settings, often seen standing stoically along the water's edge. An adult Grey Heron is a large bird, reaching up to 100 cm in height, with a wingspan between 155 to 195 cm. It weighs between 1 to 2 kg. The plumage is predominantly ashy-grey above, with a greyish-white underbelly and some black on the flanks. A striking feature is the white head and neck adorned with a broad black stripe that extends from the eye to the black crest. The beak is pinkish-yellow, long, and sharply pointed, while the legs are a brown hue.

When identifying the Grey Heron, look for the white head with the black supercilium and crest, the long grey neck, and the ashy-grey wings and back. The underparts are lighter, and the legs are long and brown. Juveniles can be distinguished by their duller grey neck and smaller crest. The beak is a useful indicator of age, being brighter in breeding adults.

Grey Herons are highly adaptable and can be found in a variety of watery habitats including lakes, rivers, ponds, marshes, and coastal environments. They require shallow waters for foraging or areas with shelving margins where they can wade.

Native to temperate Europe and Asia, as well as parts of Africa, the Grey Heron has a broad range. Northern populations may migrate southwards in autumn, while others remain resident year-round. Vagrant sightings have occurred in the Caribbean, Bermuda, and parts of North America.

The Grey Heron exhibits a slow, deliberate flight with its neck retracted in an S-shape. It is known for its solitary foraging habits, often standing motionless or stalking prey through shallow waters. It is also a communal rooster, often found in trees or cliffs at night.

The primary call of the Grey Heron is a loud croaking "fraaank." At breeding colonies, a variety of guttural and raucous noises can be heard, including greeting calls between mates and alarm calls when predators are nearby.

Breeding takes place in colonies, or heronries, typically in high trees near water. Nests are reused and added to each year. The breeding season sees a clutch of three to five bluish-green eggs laid, which both parents incubate. Chicks fledge at 7-8 weeks old.

The Grey Heron can be confused with the larger North American Great Blue Heron or the South American Cocoi Heron. However, it can be distinguished by its size and the coloration of its flanks and thighs.

Grey Herons are apex predators within their ecosystem, feeding on a variety of aquatic creatures such as fish, amphibians, crustaceans, and insects. They have also been known to consume small mammals and juvenile birds.

The Grey Heron is classified as Least Concern by the IUCN, indicating a stable and widespread population.

14-8-2017 AMSTERDAM, NETHERLANDS - EURASIAN GREAT CORMORANT (Phalacrocorax carbo)

The great cormorant (Phalacrocorax carbo), a robust seabird, is cloaked in predominantly black plumage. It is a member of the cormorant family, with a widespread distribution. The species exhibits considerable size variation across its range, with males generally larger than females. Notable features include a longish tail and a distinctive yellow throat-patch. During the breeding season, adults boast white patches on their thighs and throat.

To identify the great cormorant, look for its large size, heavy build, and thick bill. It lacks a crest and its plumage does not have a green tinge, distinguishing it from the common shag. In North America, it is bulkier than the double-crested cormorant and has less yellow on the throat and bill. The white thigh patches are a key identifier.

Great cormorants are found in a variety of aquatic environments including seas, estuaries, freshwater lakes, and rivers. They often nest in colonies close to these water bodies.

This species has a broad distribution, breeding across the Old World, Australia, and the Atlantic coast of North America. Northern populations tend to migrate southward in winter, seeking coasts rich in fish.

Great cormorants are generally silent but may emit guttural noises at breeding colonies. They are known for their wing-drying posture, often seen with wings outstretched to dry after diving.

Mostly silent, the great cormorant vocalizes with guttural sounds in the vicinity of its breeding colonies.

Great cormorants typically nest in colonies near wetlands, rivers, or sheltered inshore waters, often returning to the same site annually. Their nests are constructed from sticks and can be located in trees, on cliff ledges, or on predator-free ground. They lay clutches of three to five pale blue or green eggs, which are incubated for about 28 to 31 days.

These birds are piscivorous, diving to catch fish such as wrasses, sand smelt, flathead, and common soles. They exhibit seasonal dietary shifts, preferring larger fish in colder temperatures. Their foraging efficiency is influenced by the size of the prey rather than the quantity.

The great cormorant is currently listed as Least Concern by the IUCN. Conservation efforts have led to a population rebound, with approximately 1.2 million birds in Europe alone. However, their increasing numbers have led to conflicts with fisheries due to predation on fish stocks.

14-8-2017 AMSTERDAM, NETHERLANDS - MALLARD HYBRID (MALE) (Anas platyrhynchos)

14-8-2017 AMSTERDAM, NETHERLANDS - NORTHERN LAPWING (JUVENILE) (Vanellus vanellus)

The Northern Lapwing, known scientifically as Vanellus vanellus, is a distinctive bird with a notable crest on its head. It measures 28–33 cm in length, with a wingspan of 67–87 cm and a body mass ranging from 128–330 g. The species exhibits sexual dimorphism; males have a pronounced crest and a stark black crown, throat, and breast, which contrasts sharply with their white face. Females and juveniles have shorter crests and less defined head markings, but their overall plumage is similar to that of the males, with a black and white coloration and a greenish tint on the back.

When identifying the Northern Lapwing, look for its rounded wings, short legs, and the characteristic crest that adorns its head. The male's long crest and contrasting black and white facial patterns are particularly striking during the breeding season. In flight, the species can be recognized by its slow wingbeats and the rounded shape of its wings.

The Northern Lapwing is a ground-nesting bird that favors open landscapes such as cultivated fields, grasslands, and wetlands. It is adaptable and can be found in a variety of temperate environments across Eurosiberia.

This bird is a widespread resident throughout temperate regions of Eurosiberia. It is highly migratory, wintering in regions as far south as North Africa and parts of Asia. Western European populations are more sedentary, while vagrants have been known to appear in North America following storms.

The Northern Lapwing is known for its acrobatic display flights, accompanied by a cacophony of calls during the breeding season. It migrates predominantly during the day, often in large flocks. The species is fiercely protective of its nest and young, boldly confronting any potential threats. In winter, it gathers in massive flocks on open land, and it is known to feed nocturnally when the moon is bright.

The Northern Lapwing is quite vocal, especially in the breeding season. Its contact call is a loud "pee-wit," which is also the origin of one of its common names. Males perform a display flight while emitting a wheezy "pee-wit, wit wit, eeze wit," and they may also produce squeaking or mewing sounds.

Breeding takes place on the ground in a simple scrape. The species typically lays 3–4 eggs, which are zealously defended against all intruders. The Northern Lapwing's breeding strategy includes feigning injury to distract predators from its nest.

Its diet consists primarily of insects and other small invertebrates. The Northern Lapwing often feeds in mixed flocks with Golden Plovers and Black-headed Gulls, the latter of which may steal food but also offer some protection against predators.

The Northern Lapwing is currently classified as Near Threatened on the IUCN Red List. Its populations have declined due to intensive agricultural practices, habitat loss, and predation. Conservation efforts include habitat restoration and management to support this species' recovery.

14-8-2017 AMSTERDAM, NETHERLANDS - MUTE SWAN (Cygnus olor)

The mute swan, Cygnus olor, is a majestic bird, easily recognized by its all-white plumage and the distinctive orange beak bordered with black. The male, known as a cob, is noted for a prominent knob atop the beak, which is more pronounced than that of the female, or pen.

Adult mute swans measure between 125 to 160 cm in length, with a wingspan of 200 to 240 cm. The males are generally larger than females and possess a larger knob on their bill. The species is one of the heaviest flying birds, with males reaching weights up to 14.3 kg and females up to 10.6 kg. Juveniles, or cygnets, are not as bright white as adults and have a dull greyish-black bill for their first year.

Mute swans are found in a variety of wetland habitats, including lakes, ponds, rivers, and coastal areas, where they build large mounds of vegetation for nesting.

Native to Eurosiberia, the mute swan has been introduced to North America, Australasia, and southern Africa. It is partially migratory in northern latitudes, with some populations moving as far south as North Africa and the Mediterranean.

Mute swans are territorial and monogamous, often reusing the same nest each year. They are less vocal than other swan species but are known for their aggressive defense of their nests and offspring. They can be seen performing a threat display known as busking, with wings half raised and neck curved back.

14-8-2017 AMSTERDAM, NETHERLANDS - MUTE SWAN (JUVENILE) (Cygnus olor)

The mute swan, Cygnus olor, is a majestic bird, easily recognized by its all-white plumage and the distinctive orange beak bordered with black. The male, known as a cob, is noted for a prominent knob atop the beak, which is more pronounced than that of the female, or pen.

Adult mute swans measure between 125 to 160 cm in length, with a wingspan of 200 to 240 cm. The males are generally larger than females and possess a larger knob on their bill. The species is one of the heaviest flying birds, with males reaching weights up to 14.3 kg and females up to 10.6 kg. Juveniles, or cygnets, are not as bright white as adults and have a dull greyish-black bill for their first year.

Mute swans are found in a variety of wetland habitats, including lakes, ponds, rivers, and coastal areas, where they build large mounds of vegetation for nesting.

Native to Eurosiberia, the mute swan has been introduced to North America, Australasia, and southern Africa. It is partially migratory in northern latitudes, with some populations moving as far south as North Africa and the Mediterranean.

Mute swans are territorial and monogamous, often reusing the same nest each year. They are less vocal than other swan species but are known for their aggressive defense of their nests and offspring. They can be seen performing a threat display known as busking, with wings half raised and neck curved back.

14-8-2017 AMSTERDAM, NETHERLANDS - GREAT TIT (Parus major)

The Great tit (Parus major) is a widespread and common songbird throughout Europe, the Middle East, Central Asia, and east across the Palearctic to the Amur River, south to parts of North Africa. It has adapted well to human changes in the environment and is a common and familiar bird in urban parks and gardens. It is also an important study species in ornithology.

The Great tit has a distinctive appearance that makes it easy to recognize. The nominate race has a bluish-black crown, black neck, throat, bib, and head, and white cheeks and ear coverts. The breast is bright lemon-yellow and there is a broad black mid-line stripe running from the bib to the vent. There is a dull white spot on the neck turning to greenish yellow on the upper nape. The rest of the nape and back are green-tinged with olive. The wing-coverts are green, and the rest of the wing is bluish-grey with a white wing bar. The tail is bluish-grey with white outer tips. The plumage of the female is similar to that of the male except that the colors are overall duller.

14-8-2017 AMSTERDAM, NETHERLANDS - BLACK CROWNED NIGHT HERON (Nycticorax nycticorax)

The Black-crowned Night Heron, scientifically known as Nycticorax nycticorax, is a medium-sized heron with a global presence, spanning parts of Europe, Asia, and the Americas. It is distinguished by its black crown and back, contrasting with a white or grey body, red eyes, and short yellow legs. Notably, it deviates from the typical heron silhouette, appearing more robust with shorter bills, legs, and necks compared to its egret and day heron relatives.

Adults boast a striking black crown and back, with the rest of their plumage primarily white or grey. Their eyes are a vivid red, and they stand on short yellow legs. During social interactions, such as greeting or courtship, they display two or three elongated white plumes that extend from the back of their heads. Males and females are similar in appearance, though males may be marginally larger. Juveniles, on the other hand, are cloaked in a dull grey-brown with pale spots and streaks, and their eyes are a more subdued orange with less vibrant legs.

These herons favor fresh and salt-water wetlands as their breeding grounds, which are found across their vast range.

The Black-crowned Night Heron breeds across various regions: from Eurasia to Africa, the Indonesian Archipelago, North and South America, and even the remote Falkland Islands. While migratory in the northern extremes, it is generally a resident species, with North American populations wintering in warmer climes from Mexico to the West Indies.

Known for their ambush hunting tactics, these herons stand motionless at the water's edge, striking at prey primarily during the night or early morning. They exhibit a diverse diet, consuming fish, amphibians, insects, and more. They are also one of the few heron species to use tools, such as bait, to fish. By day, they rest in trees or shrubbery, and outside of breeding season, some subspecies display more sociable tendencies.

 

The Black-crowned Night Heron is a vocal species within its colonies, often heard making a "quok" or "woc" sound.

Colonial nesters, they construct platforms of sticks in trees or on the ground in protected areas. Clutch sizes range from three to eight eggs.

 

Their diet is varied, including small fish, crustaceans, insects, small mammals, and even refuse. They have been observed using bait to attract fish, a rare behavior for birds.

The IUCN lists the Black-crowned Night Heron as Least Concern, indicating a stable population across its extensive range.