Saturday, 5 August 2017
Friday, 4 August 2017
2-8-2017 CENTRAL PARK, BUDAPEST - EASTERN WHITE PELICAN (Pelecanus onocrotalus)
The Great white pelican is a huge bird - only the Dalmatian pelican is, on average, larger among pelicans. The male has a downward bend in the neck and the female has a shorter, straighter beak. The plumage is predominantly white except on remiges, with a faint pink tinge on the neck and a yellowish base on the foreneck. The primary feathers are black, with white shafts at the bases, occasionally with paler tips and narrow fringes. The secondary feathers are also black but with a whitish fringe. The upperwing coverts, underwing coverts, and tertials are white. The forehead is swollen and pinkish skin surrounds the bare, dark eyes having brown-red to dark brown irides. It has fleshy-yellow legs and pointed forehead-feathers where meeting the culmen. In breeding season, the male has pinkish skin while the female has orangey skin on its face. The bill is mostly bluish-grey, with a red tip, reddish maxilla edges, and a cream-yellow to yolk-yellow gular pouch. The white plumage becomes tinged-pink with a yellow patch on the breast, and the body is tinged with yellowish-rosy. It also has a short, shaggy crest on the nape. The white covert feathers contrast with the solid black primary and secondary feathers. The legs are yellow-flesh to pinkish orange. Both male and female are similar, but the female is smaller and has brighter orange facial skin in the breeding season. The juvenile has darker, brownish underparts that are palest at the rump, center of the belly, and uppertail coverts. The underwing coverts are mostly dull-white, but the greater coverts are dark and there is a dark brownish bar over the lesser coverts. The rear tertials upperwing coverts mostly have paler tips with a silvery-grey tinge on the greater secondary coverts and tertials. It has dark flight feathers and brown-edged wings. The head, neck, and upperparts, including the upperwing coverts, are mostly brown - this is the darkest part of the neck. The facial skin and the bill, including its gular pouch, are greyish to dusky greyish. The forehead, rump, and abdomen are white, and its legs and feet are grey. Its blackish tail occasionally has a silvery-grey tinge. Its underparts and back are initially browner and darker than those of the Dalmatian pelican, and the underwing is strongly patterned, similar to the juvenile Brown pelican.
The Great white pelican (Pelecanus onocrotalus) that lives in the shallow swamps in Africa is one of the largest flying birds in the world. It has the abilities of multiple birds, such as long flights and swimming. Its unique characteristic is the “gular pouch” inside its beak. Its legs are short and strong with fully webbed toes that allow it to propel itself in water and to take off from the surface of the water. They are powerful fliers and often travel in flocks in a V-formation to reduce drag for the group.
Resident populations of Great white pelicans are found the whole year round south of the Sahara Desert in Africa. Migratory populations inhabit Eastern Europe to Kazakhstan when it is the breeding season and during the winter in northeast Africa and Iraq to the north of India and southern Vietnam. In Europe, they occur in freshwater lakes, marshes, swamps, or deltas, wherever there are sufficient amounts of grasses or reed beds for nesting. In Africa, they are found in lowlands and freshwater or alkaline lakes. Shallow, warm water is needed for the fishing technique of these birds.
Great white pelicans live, breed, migrate, feed, and fly in formation in large colonies. Fishing is usually over by 8-9 a.m. and they spend the remainder of the day on small islands or sandbars resting, preening, and bathing. They bathe by ducking their head and body into the water while flapping their wings. When hot, they will spread their wings or gape to cool down. Large flocks may congregate at traditional roosts, these places also being used after fishing tips as daytime resting sites. They sometimes perch in trees, but usually, they roost on the ground. To defend his territory, a male threatens intruders by gaping, clapping his bill, and bowing, attacking with his bill if necessary. These birds are generally silent except in the breeding season when the adults make low, hoarse display calls.
Great white pelicans are monogamous and form long-term pair bonds. During the breeding season, a male behaves territorially: gaping, bowing, and clapping his bill, and may attack other males with his bill if they come too close. April or May is when the breeding season commences in temperate zones, but in Africa, it is essentially all year round, and in India, it runs from February until April. Males display their head crest and their brightly colored pouch. A pair will build a rudimentary nest from sticks on the ground or in a tree. They typically nest in colonies, along shallow lakes, in swamps, or on islands. Two eggs are usually laid and are incubated by the female for 31 days. Chicks fledge at 75 to 85 days, reaching reproductive maturity when three to four years old.
Thursday, 3 August 2017
30-7-2017 CENTRAL PARK, BUDAPEST - 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.
30-7-2017 CENTRAL PARK, BUDAPEST - WHITE EYED DUCK (Aythya australis)
The hardhead (Aythya australis ), also known as the white-eyed duck, is the only true diving duck found in Australia. The common name "hardhead" has nothing to do with the density of the bird's skull, instead referring to the difficulty encountered by early taxidermists in processing the head. Hardheads are found in wetter, coastal regions of Australia, particularly in the south-east, but are known to disperse as far afield as New Guinea, New Zealand, and the Pacific Islands.
Hardheads are smaller than most ducks, usually not reaching much more than 45 cm long but sometimes reaching 60 cm, and noticeably more rounded in overall form than most ducks. Both male and female are a fairly uniform chocolate-brown above, with rufous flanks and white undersides (which are often not visible if the duck is in the water). The trailing edges and almost the entire underside of the wings are white. In the male, the eyes are a striking white, in the female, brown.
2-8-2017 CENTRAL PARK, BUDAPEST - GREY HERON (Ardea cinerea)
The grey heron (Ardea cinerea) is a long-legged wading bird of the heron family, Ardeidae, native throughout temperate Europe and Asia, and also parts of Africa. It is resident in much of its range, but some populations from the more northern parts migrate southwards in autumn. A bird of wetland areas, it can be seen around lakes, rivers, ponds, marshes and on the sea coast. It feeds mostly on aquatic creatures which it catches after standing stationary beside or in the water, or stalking its prey through the shallows.
Standing up to 1 metre (3 ft 3 in) tall, adults weigh from 1 to 2 kg (2 to 4 lb). They have a white head and neck with a broad black stripe that extends from the eye to the black crest. The body and wings are grey above and the underparts are greyish-white, with some black on the flanks. The long, sharply pointed beak is pinkish-yellow and the legs are brown.
Raising a nest full of baby herons is hard work! During the breeding season, some Gray Herons spend up to 23 hours per day foraging and some travel up to 38 km (24 miles) from their nest in search of food.
Gray Herons usually feed on smaller fish, 10–25 cm (4–10 inches) long, but some ambitious individuals take fish weighing up to 500 grams (1.1 pounds) and eels that are up to 60 cm (24 inches) long.
Gray Herons live in Eurasia and Africa, but rare individuals stray from their normal range to places like the Lesser Antilles in the Caribbean Sea. Despite the Gray Heron's similarity to Great Blue Heron, some observers have also documented this species from the Atlantic Coast of mainland North America, from Newfoundland to Virginia, and also from Alaska’s Aleutian Islands.
2-8-2017 CENTRAL PARK, BUDAPEST - SOUTHERN BALD IBIS (Geronticus calvis)
The southern bald ibis (Geronticus calvus ) is a large bird found in open grassland or semi-desert in the mountains of southern Africa. Taxonomically, it is most closely related to its counterpart in the northern regions of Africa, the waldrapp (Geronticus eremita). As a species, it has a very restricted homerange, limited to the southern tips of South Africa in highland and mountainous regions.
This large, glossy, blue-black ibis has an unfeathered red face and head, and a long, decurved red bill. It breeds colonially on and amongst rocks and on cliffs, laying two or three eggs which are incubated for 21 days before hatching. It is a large bird that feeds and roosts in substantial groups. It feeds on insects, small reptiles, rodents and small birds. They do little vocalizing other than occasional gobbling sounds.
The ibises are gregarious long-legged wading birds with long down-curved bills; they form one subfamily of the Threskiornithidae, the other subfamily being the spoonbills. The two Geronticus species differ from other ibises in that they have unfeathered faces and heads, breed on cliffs rather than in trees, and prefer arid habitats to the wetlands used by their relatives. The species is currently listed as vulnerable on the IUCN Red List, however, it is in no immediate danger of extinction.
The southern bald ibis (Geronticus calvus) is an uncommon bird endemic to the highlands of the southern African region. In South Africa, the species’ total breeding population is estimated around 4 600 birds. However, little is known about the biology of this species.
Its plumage is dark green with iridescent streaks of green, violet and bronze. The neck displays long feathers that are a blue-green shade. As adults, its shoulders display shades of copper. However, as juveniles, the plumage is predominantly a dull grey color. The bird's Latin name, Geronticus calvus, is translated as “bald, old man”, referring to the bird's featherless, wrinkled head and face. The head is the key feature in recognizing this species due to the evident bare whitish skin. On the top of the head, there is a red dome-shaped crown. The bills of these birds are down-curved and red, along with their legs. Similarly, their eyes are also colored an orange-red shade.
The southern bald ibis is a species with a very restricted homerange. It is estimated that there are only 4 600 breeding birds of this species in the South African region. The species is confined to the eastern regions of South Africa and are restricted to the highland and mountainous regions. Its range extends from the highlands of Lesotho extending into Eswatini. The birds may migrate short distances within their designated home ranges.
These birds are cliff-nesters and breed in the open areas of mountain faces, as well as river gorges and sometimes around waterfalls. Their breeding habitat is composed mainly of mountainous grasslands that range in altitude from 1 200 to 2 000 meters above sea level. The grassland areas are labeled as ‘sour’ due to the low nutritional value of the foliage in late summer and early autumn due to the previous grazing of mammals.
This species is insectivorous and feeds predominantly on insects and other small terrestrial invertebrates. It is a forager, alternating between feeding in harvested maize fields, overgrazed pastures and burnt grasslands. They walk along the land while pecking and probing the ground. The main component of its diet is the caterpillar of the maize stalk borer, Busseola fusca. This bird will also turn over feces and leaves to search for prey including caterpillars, grasshoppers, beetles, earthworms, snails and sometimes frogs, small dead mammals and birds.
Throughout July and the first half of August, before laying their eggs, the birds are found foraging in maize fields. In the second half of August and early September, during the incubation period, the birds are seen alternating between the maize fields, grazed pastures and burnt grasslands. Finally, in the nestling phase of September and October, they forge in maize fields, but more frequently in ploughed fields. It is only on rare occasions that ibises are seen in tall grasses and almost never in marshy areas. These birds avoid the tall grasses due to the hindering of their mobility and the potential hiding of their prey. This area would require a slow-walk feeding technique, whereas this bird is known to use a fast-walk technique for their feeding. They also appear to avoid foraging in areas very close to their nesting sites
Their predominant feeding area, the burnt grasslands, are termed “sour” due to the low availability of nutrients. These areas are burned every 1 to 3 years to clear any excess of foliage. In winter and spring, the ibises feed in the burned areas where new growth is emerging and scavenge for any available insects. Their breeding season is linked with the burning period of these crops. Therefore, successful breeding and survival is partially dependent on the availability of these burned grasslands.
The southern bald ibis nests in cliffs and breeds on open ledges. Due to the mostly inaccessible nature of these areas, observations during breeding season are difficult to obtain. However, these birds are known to breed predominantly in colonies, while some pairs decide to nest away from the rest. The females lay their eggs anywhere from late July to mid-October. Following this, the young develop feathers for flight around mid-October and into the month of December.
Their nests are made mostly of sticks and grass. On average, the collection of these materials begins around two weeks before the first egg is laid. Once the first egg is laid, incubation lasts from 26 to 32 days. The incubating birds change their position and rotate the egg more frequently around three days before the hatch day. Once hatched, the chicks spend the first 7 to 10 days feeding from their parent via regurgitation. After 35 days, the young leave the nest to wander around and after 40 to 50 days, the chicks are able to fly, but still spend most of their time on the ledges of the cliff or in their nest.
Wednesday, 2 August 2017
2-8-2017 CENTRAL PARK, BUDAPEST - BATELEUR EAGLE (Terathopius ecaudatus)
Adult Bateleurs are unmistakable with their black and chestnut plumage, grey wing patches, and bright red cere and feet. In flight, they exhibit elongated, narrow wings that appear pinched at the bases and pointed at the tips. The juvenile's longer tail and uniform brown coloration distinguish it from adults.
Bateleurs favor open savanna habitats with some trees and dry woodlands across Sub-Saharan Africa. They require leafy trees for nesting and are often found near watercourses.
This species is widespread throughout Sub-Saharan Africa and marginally into Arabia. It is more common in protected areas and has experienced significant declines in certain regions.
Bateleurs are highly aerial, spending much time soaring with a distinctive rocking motion. They are solitary but may form loose congregations at rich feeding areas. They are sensitive to disturbance, especially at the nest, and can become unusually tame in captivity.
Bateleurs are generally silent but may emit a loud, raucous "schaaaa-aw" when excited or during courtship. They also produce resonant barking calls and softer calls near the nest.
Bateleurs build small but sturdy stick nests in large trees and lay a single egg. They may take up to 7 to 8 years to reach full maturity. The species is known for its elaborate courtship displays.
Juvenile Bateleurs could be confused with brown snake eagles due to their similar size and proportions, but the latter have yellow eyes and longer legs.
Bateleurs have a generalist diet that includes carrion and a wide range of live prey, such as mammals, birds, and reptiles. They forage from flight, often descending in tight spirals to investigate potential food.
Bateleur is French for 'tightrope-walker'. This name was probably chosen because of its distinctive aerial acrobatics.
A very distinctive, short-tailed eagle. Young birds are uniformly dark brown, and adults are mostly black with a bright red face and legs. Sexes differ, especially in flight, and can be told by the width of the black band on the back edge of the white underwing: narrow in females, broad in males. It flies low when foraging, with wings raised above the body and rocking from left to right in an unstable-looking fashion. Bateleurs hunt small animals and eat carrion, and they are often among the first raptors to arrive at a carcass.
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