2-8-2017 CENTRAL PARK, BUDAPEST - RUDDY SHELDUCK (Tadorna ferruginea)

The Ruddy shelduck (Tadorna ferruginea) is a distinctive waterfowl that has a loud honking call. The ruddy shelduck mostly inhabits inland water-bodies and forms a long lasting pair bond. In central and eastern Asia, populations of this species are steady or rising, but in Europe, they are generally in decline.

The male Ruddy shelduck has orange-brown body plumage and a paler, orange-brown head and neck, separated from the body by a narrow black collar. The rump, flight feathers, tail-coverts, and tail feathers are black and there are iridescent green speculum feathers on the inner surfaces of the wings. Both upper and lower wing coverts are white, this feature being particularly noticeable in flight but hardly visible when the bird is at rest. The bill is black and the legs are dark grey. The female is similar but has a rather pale, whitish head and neck and lacks the black collar, and in both sexes, the coloring is variable and fades as the feathers age. The birds molt at the end of the breeding season and the male loses the black collar, but a further partial molt between December and April restores it. Juveniles are similar to the female but are a darker shade of brown

Ruddy shelducks breed from southeast Europe across the Palearctic to Lake Baikal, Mongolia, and western China. There are also very small resident populations of this species in Northwest Africa and Ethiopia. Most populations are migratory, wintering in the Indian subcontinent and breeding in southeastern Europe and central Asia, though there are small resident populations in North Africa. Ruddy shelducks are usually found in open locations on inland bodies of water such as lakes, reservoirs, and rivers. They rarely occur in forested areas but do occur in brackish water and saline lagoons. They typically breed in large wetlands and rivers with mud flats and shingle banks, and they are found in large numbers on lakes and reservoirs. They breed in high-altitude lakes and swamps in Jammu and Kashmir. Outside the breeding season, they prefer lowland streams, sluggish rivers, ponds, flooded grassland, marshes, and brackish lagoons.

Ruddy shelducks are social birds. They are usually found in pairs or small groups and rarely form large flocks. However, molting and wintering gatherings on chosen lakes or slow rivers can be very large. Ruddy shelducks are active during the night. On land, they graze on the foliage, but when in the water they do not dive; they dabble in the shallows, and at greater depths, they up-end. Ruddy shelducks are very noisy when in flocks. Their call is a series of loud, nasal honking notes. The calls are made both on the ground and in the air, and the sounds are variable according to the circumstances in which they are uttered.

Ruddy shelducks are monogamous a form strong pair bonds that are thought to last for life. The birds arrive at their main breeding grounds in central Asia in March and April. When nesting Ruddy shelducks are very aggressive towards their own kind and towards other species. The female in particular approaches intruders with head lowered and neck outstretched, uttering anger calls. If the intruder stands its ground, the female returns to the male and runs around him, inciting him to attack. He may or may not do so. Courtship ritual includes neck stretching, head dipping, and tail raising. The nesting site is often far away from water in a hole in a tree or ruined building, a crevice in a cliff, among sand dunes, or in an animal burrow. The nest is constructed by the female using feathers and down and some grasses. The female lays 6-12 eggs between late April and early June and incubates them alone while the male stands in attendance nearby. The eggs hatch after about 28 days and both parents care for the young, which fledge in a further 55 days. After breeding the adults moult, losing the power of flight for about a month while they do so. Before molting they move to large water bodies where they can more easily avoid predation while they are flightless. The family may stay together as a group for some time; the autumn migration starts around September and the young may mature in their second year. North African birds usually breed about 5 weeks earlier.

2-8-2017 CENTRAL PARK, BUDAPEST - AUSTRALIAN WOOD DUCK (Chenonetta jubata)

The Australian wood duck, maned duck or maned goose (Chenonetta jubata ) is a dabbling duck found throughout much of Australia. It is the only living species in the genus Chenonetta. Traditionally placed in the subfamily Anatinae (dabbling ducks), it might belong to the subfamily Tadorninae (shelducks); the ringed teal may be its closest living relative.

This 45–51 cm duck looks like a small goose, and mostly feeds by grazing in flocks.

The male is grey with a dark brown head and mottled breast. The female has white stripes above and below the eye and mottled underparts. Both sexes have grey wings with black primaries and a white speculum. Juveniles are similar to adult females, but lighter and with a more streaky breast.

The Australian wood duck is widespread in Australia, including Tasmania. The Australian wood duck is found in grasslands, open woodlands, wetlands, flooded pastures and along the coast in inlets and bays. It is also common on farmland with dams, as well as around rice fields, sewage ponds and in urban parks. It will often be found around deeper lakes that may be unsuitable for other waterbirds' foraging, as it prefers to forage on land. It has been recorded as a vagrant in New Zealand, although in 2015 and 2016 a pair successfully bred there.

The Australian wood duck eats grasses, grains, clover and other herbs, and occasionally, insects. It is rarely seen on open water, preferring to forage by dabbling in shallow water, or in grasslands and crops.

Australian wood duck nests in cavities in trees or in nest-boxes above or near water. Nests are made with a pile of down.

This duck nests in a tree cavity laying 9–11 cream-white eggs, similar to the Mandarin ducks. The female incubates them while the male stands guard. Once the ducklings are ready to leave the nest, the female flies to the ground and the duckling will leap to the ground and follow their parents. The males also secure their ducklings closely along with the females.

2-8-2017 CENTRAL PARK, BUDAPEST - RED WINGED PARROT (Aprosmictus erythropterus)

The Red-winged Parrot, a vibrant avian species, is a medium-sized parrot measuring approximately 30 to 33 centimeters in length. Exhibiting sexual dimorphism, the males boast a striking black nape, a lower blue back, and a rump with a yellow-tipped tail, complemented by an orange bill and grey feet. The females, on the other hand, display a more subdued yellowish-green plumage with red and pink accents on their wings and a light blue lower back. Their irises are dark, contrasting with the males' lighter coloration. Juvenile Red-winged Parrots share a resemblance with the females but can be identified by their orange/yellow beaks and pale brown irises. It takes about two years for males and one and a half years for females to acquire their full adult plumage.

When observing these birds, look for the distinctive bright red wings that are a hallmark of both sexes. The male's black nape and blue-tinted back are key identifiers, while the female's lighter green body and pink wing trimmings will help differentiate her from the male. The juveniles' paler beaks and irises are also noteworthy features for identification.

Red-winged Parrots are known to inhabit a variety of environments including riverine forests, forest edges, acacia scrub, savannas, mangroves, and farmlands. They are often found in proximity to water sources.

These parrots have a broad range extending from the Pilbara region in Western Australia to Cape York Peninsula in Queensland, and as far south as northeast South Australia. They have also been sighted in southern New Guinea.

2-8-2017 CENTRAL PARK, BUDAPEST - ZEBRA FINCH (Taeniopygia guttata)

The Sunda zebra finch, known scientifically as Taeniopygia guttata, is a charming bird belonging to the family Estrildidae. This species graces the Lesser Sundas with its presence, adding a touch of elegance to the region's avian diversity.

With a time-span of 70 to 80 days from hatching to becoming sexually active, the Zebra Finch is one of the fastest maturing bird species recorded.

Zebra Finches are mainly grey, with characteristic black 'tear drop' eye stripes and 'zebra like' black and white barring on the rump and upper tail. The throat and upper breast are pale grey, with fine black barring, and there is a broad black band on upper chest. The sides of the belly are chestnut with many white spots. The remainder of the belly and the undertail are white. The male is distinguished from the female by its orange chestnut cheek patches, a character that gave the species the alternative name of Chestnut-eared Finch. Both sexes have red eyes and bill. The legs and feet are orange yellow. Young are similar in plumage to the female, except that the clear black and white markings of the head are absent. The eyes are grey-brown and the bill is black.

Zebra Finches are most commonly found in the drier areas of Australia, living year round in social flocks of up to 100 or more birds. They can be found in a variety of habitats, mainly dry wooded grasslands, bordering watercourses.

Zebra Finches are the most common and widespread of Australia's grassfinches, found across the Australian mainland, with the exception of Cape York Peninsula and some coastal areas. They are also found in Timor and the Lesser Sunda Islands.

Only male zebra finches sing. Each finch has an individual song. Between the ages of 25 and 90 days old, young zebra finches learn to sing by copying the songs of adults, and sometimes by copying the songs of other juveniles.

The Sunda zebra finch is currently classified as Least Concern by the IUCN, indicating a stable population without immediate threats to its survival.

In the realm of scientific research, the Sunda zebra finch has proven to be an invaluable model organism. Studies focusing on its immune response to parasites have shed light on the defensive mechanisms of birds as a whole. Remarkably, this species appears to be completely resistant to Plasmodium relictum, the most common malaria parasite found in avians, a discovery that could have significant implications for understanding disease resistance in birds.

4-8-2017 VIENNA, AUSTRIA - EURASIAN BLACKBIRD (MALE) (Turdus merula)

The Common Blackbird, Turdus merula, is a true thrush and a familiar sight in gardens and woodlands. The male is distinguished by its all-black plumage, bright yellow eye-ring, and orange-yellow bill, which darkens slightly during winter. Females and juveniles are more demure in their attire, sporting mainly dark brown feathers.

Adult males are entirely black with the exception of the yellow eye-ring and bill. Females are sooty-brown with a duller bill, and juveniles resemble females but have pale spots on their upperparts. The very young may also exhibit a speckled breast.

The Common Blackbird thrives in a variety of habitats including woodlands with dense undergrowth, gardens, parks, and hedgerows. It shows a preference for deciduous trees and areas with thick vegetation.

This species is widespread across Europe, western Asia, and North Africa. It has also been introduced to Australia and New Zealand. Its range varies from resident populations in the milder regions to partially or fully migratory populations in areas with more severe winters.

The Common Blackbird is territorial, especially during breeding season, with males displaying distinctive threat behaviors to ward off rivals. Outside of breeding season, they can be more sociable, often forming small flocks. The species is known for its adaptability to urban environments, where it may overwinter more readily than in rural settings.

The male's song is a melodious and fluted warble, often heard from elevated perches during the breeding season. The Common Blackbird also has a repertoire of calls including a sharp "seee" when agitated and a "pook-pook-pook" to signal ground predators.

Monogamous by nature, the Common Blackbird builds a neat, cup-shaped nest, often in dense shrubbery. The female lays three to five bluish-green eggs adorned with reddish-brown blotches. Both parents are involved in feeding the altricial chicks until they fledge.

The Common Blackbird can be confused with the Ring Ouzel or the Common Starling in Europe. In Asia, it has several similar-looking relatives, such as the Indian, Tibetan, and Chinese Blackbirds, which were once considered subspecies.

An omnivore, the Common Blackbird forages primarily on the ground for insects, earthworms, seeds, and berries. It is adept at pulling earthworms from the soil and foraging through leaf litter for other invertebrates.

The IUCN lists the Common Blackbird as Least Concern. It has a vast range and a large, stable population, though there have been localized declines due to changes in agricultural practices and urbanization.

2-8-2017 CENTRAL PARK, BUDAPEST - DIAMOND FIRETAIL FINCH (Stagonopleura guttata)

The diamond firetail (Stagonopleura guttata ) is a species of estrildid finch that is endemic to Australia. It has a patchy distribution and generally occupies drier forests and grassy woodlands west of the Great Dividing Range from SE Queensland to the Eyre Peninsula in South Australia. While it is a small stocky bird it is one of the largest finches in Australia. The birds are very distinctive with a black breast-band on a white breast. The flanks are black with white spots and it has a scarlet rump (hence the name) and a black tail.

The diamond firetail is one of the largest of the Australian finches by both weight (15-19gm) and wingspan (64-71mm). eBird describes the firetail having an olive back and grey head. The belly and throat are white with a complete black band. The flanks are black with distinctive white spots. The rump is bright red and the tip of the tail is black. The rump is also described as scarlet by some authors. Juvenile diamond firetails are duller than the adults and have a black bill.

The rump is very distinctive in flight. These birds are generally seen in pairs or small flocks, sometimes up to a hundred birds. The birds fly low and in long lines.

The diamond firetail has a patchy distribution from South East Queensland to the Eyre Peninsula in South Australia. The Australian Bird Guide shows its core distribution from Southern Queensland (just north in Inglewood) through to Victoria and around the coast to the Eyre Peninsula in South Australia and the eBird distribution is similar. Birdlife Australia has a more extensive distribution from the Carnarvon Ranges in Queensland to the Eyre Peninsula and Kangaroo Island which is broader than other references. This broader distribution reflects the historic range of the bird based on the surveys done for The Atlas of Australian Birds. The species was recorded as far north as the Kirrama Tableland in North Queensland in 1917, "new record for the district".

The bird is mostly sedentary and lives in open grassy eucalypt forest and woodland, heath, mallee country, farmland and grassland with scattered trees. The bird's habitat has been threatened by alteration of vegetation structure caused by over-grazing, weed invasion, salinisation and other flow-on processes. This loss of main food plants and habitat results in competition with invasive species, and increased predation.

2-8-2017 CENTRAL PARK, BUDAPEST - COMMON SHELDUCK (FEMALE) (Tadorna tadorna)

The common shelduck, Tadorna tadorna, is a waterfowl species that graces the Euro-Siberian region with its presence. It is a medium-sized bird, akin to a small, short-necked goose, and is quite the sight with its white plumage contrasted by chestnut patches and a black underbelly. The head and neck are a dark, iridescent green, and the bill is a reddish-pink, with the male sporting a conspicuous knob on the forehead during the breeding season. Pink feet complete the ensemble, making this bird a striking figure in its habitat.

To identify the common shelduck, look for the distinctive reddish-pink bill and pink feet. The male, especially in breeding plumage, has a bright red bill with a prominent knob. The female is slightly smaller and has white facial markings. Both sexes have a white body with chestnut patches, a black belly, and a dark green head and neck. In flight, the green and chestnut secondary feathers become visible, contrasting with the predominantly white underwings.

The common shelduck is found in a variety of wetland habitats, including temperate lakes and rivers, as well as estuaries and tidal mudflats in winter. It has a particular fondness for salt marshes and estuaries and is known to breed in rabbit burrows, tree holes, and even haystacks.

This species is widespread across temperate Eurasia. It breeds in temperate regions and migrates to subtropical areas for wintering. Some populations remain resident in the westernmost parts of Europe, while others undertake movements to moulting grounds like the Wadden Sea.

The common shelduck is a sociable bird, often seen in large moulting flocks that can number up to 100,000 individuals. It is known for leaving its young in crèches supervised by a few adults. The species is also covered by the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA), highlighting its ecological importance.

The vocalization of the common shelduck is a loud, unmistakable honk, which can be heard over considerable distances.

During the breeding season, the male's bill becomes particularly vibrant, and the species is known to nest in a variety of locations, from rabbit burrows to tree holes.

While the common shelduck is quite distinctive, it could potentially be confused with other shelduck species. However, its unique coloration and size generally make it easy to distinguish.

The common shelduck feeds on a variety of items, including mollusks and small aquatic creatures, which it often forages for in the mudflats during low tide.

The IUCN Red List classifies the common shelduck as Least Concern, indicating that, currently, there are no immediate threats to its population numbers on a global scale.

2-8-2017 CENTRAL PARK, BUDAPEST - BROWN PELICAN (Pelecanus occidentalis)

The Brown pelican (Pelecanus occidentalis) has been described as a comically elegant bird. Groups of these seabirds glide above surf along western and southern coasts, gracefully echoing the waves with their rise and fall. They plunge-dive from high up to feed, the force of impact serving to stun small fish, which they then scoop up. Today this species is fairly common - a good example of recovery from the pesticide pollution that once threatened them with extinction.

The Brown pelican is the smallest of the eight extant pelican species but is often one of the larger seabirds in their range nonetheless. Like all pelicans, it has a very long bill, measuring 280 to 348 mm (11.0 to 13.7 in) in length. The nominate subspecies in its breeding plumage has a white head with a yellowish wash on the crown. The nape and neck are dark maroon–brown. The upper sides of the neck have white lines along the base of the gular pouch, and the lower foreneck has a pale yellowish patch. The feathers at the center of the nape are elongated, forming short, deep chestnut crest feathers. It has a silvery gray mantle, scapulars, and upperwing coverts (feathers on the upper side of the wings), with a brownish tinge. The lesser coverts have dark bases, which gives the leading edge of the wing a streaky appearance. The uppertail coverts (feathers above the tail) are silvery white at the center, forming pale streaks. The median (between the greater and the lesser coverts), primary (connected to the distal forelimb), secondary (connected to the ulna), and greater coverts (feathers of the outermost, largest, row of upperwing coverts) are blackish, with the primaries having white shafts and the secondaries having variable silver-gray fringes. The tertials (feathers arising in the brachial region) are silver-gray with a brownish tinge. The underwing has grayish-brown remiges with white shafts to the outer primary feathers. The axillaries and covert feathers are dark, with a broad, silver–gray central area. The tail is dark gray with a variable silvery cast. The lower mandible is blackish, with a greenish-black gular pouch at the bottom for draining water when it scoops out prey. The breast and belly are dark, and the legs and feet are black. It has a grayish-white bill tinged with brown and intermixed with pale carmine spots. The crest is short and pale reddish-brown in color. The back, rump, and tail are streaked with gray and dark brown, sometimes with a rusty hue. The male and female are similar, but the female is slightly smaller. The nonbreeding adult has a white head and neck, and the pre-breeding adult has a creamy yellow head. The pink skin around the eyes becomes dull and gray in the non-breeding season. It lacks any red hue, and the pouch is strongly olivaceous ochre-tinged and the legs are olivaceous gray to blackish-gray. It has pale blue to yellowish-white irides which become brown during the breeding season. During courtship, the bill becomes pinkish red to pale orange, redder at the tip, and the pouch is blackish. Later in the breeding season, the bill becomes pale ash-gray over most of the upper jaw and the basal third of the mandible. The Brown pelican is exceptionally buoyant due to the internal air sacks beneath its skin and in its bones. It is as graceful in the air as it is clumsy on land.

The Brown pelican occurs throughout the Pacific, Atlantic, and Gulf Coasts of the Americas. Most brown pelican populations are resident (nonmigratory) and dispersive (moving from their birth site to their breeding site, or their breeding site to another breeding site); however, some populations migrate, depending on local conditions. Brown pelicans are strictly marine and coastal birds but occasionally follow large rivers during storms. They avoid the open sea and rarely occur far offshore, usually frequenting shallow waters along coasts, as well as estuaries and bays. They breed on the arid coasts of flat, bare, remote islands, or occasionally in mangroves. Brown pelicans can often be seen around fishing ports.

Brown pelicans are very gregarious and live throughout the year in flocks. They are diurnal but sometimes forage at night during a full moon. They sleep on land either while standing on both their feet or resting on their breast and belly, their head sideways on their shoulder with their beak tilted towards the side. This is the only pelican species that dives from height as the main method of obtaining food. Their air sacs enable buoyancy for them in the water. They do not swim under the water but plunge their head below the surface when catching prey. Brown pelicans are territorial during the nesting period. Threat displays, often carried out when another pelican is too close to an individual’s nest involve head swaying, indicating readiness to interact, and bowing and a "hrraa-hrraa" sound. Young pelicans who approach a nest too closely are often killed.

3-8-2017 BRATISLAVA, SLOVAKIA - HOODED CROW (Corvus cornix)

The Hooded Crow, known scientifically as Corvus cornix, is a striking bird found across parts of Europe and the Middle East. It is characterized by its ashy grey body contrasted with a black head, throat, wings, tail, and thigh feathers. The bird's bill, eyes, and feet are also black, creating a distinctive two-tone appearance. Males are generally larger than females, but both share the same coloration.

Adult Hooded Crows are identifiable by their grey and black plumage, with the grey parts appearing streaky due to the dark shafts. The bill and legs are black, and the iris is dark brown. Juveniles can be recognized by their duller plumage and bluish or greyish eyes, with a red mouth that fades as they mature. The wingspan of this bird is approximately 105 cm, and it weighs around 510 grams on average.

The Hooded Crow is adaptable and can be found in a variety of habitats including farmlands, coastal areas, and urban environments. It is also commonly seen in woodlands and on cliffs where it may forage or nest.

This species has a broad range, inhabiting Northern, Eastern, and Southeastern Europe, as well as parts of the Middle East. In areas where its range overlaps with the Carrion Crow, hybrids can occur, though they are less common due to the Hooded Crow's reclassification as a distinct species.

The Hooded Crow is an omnivorous and opportunistic feeder, known for its intelligence and adaptability. It is a scavenger that will eat a wide variety of foods, and it is also known to hide food for later consumption. The bird's flight is described as slow and heavy, and it often flies straight.

The vocalizations of the Hooded Crow are similar to those of the Carrion Crow, with a distinctive "kraa" call note that is difficult to distinguish between the two species.

Breeding occurs at different times depending on the region, with nests typically found in tall trees, cliffs, or even buildings. The nests are made of sticks and may include seaweed, bones, and wire. The eggs are blue with brown speckles, and the female incubates them alone while being fed by the male. Young fledge after about 32 to 36 days.

The Hooded Crow can be confused with the Carrion Crow and the Rook, but its grey and black plumage makes it visually distinct. The calls of the Hooded and Carrion Crows are nearly identical, adding to potential confusion.

The diet of the Hooded Crow includes molluscs, crabs, eggs of other birds, small mammals, scraps, smaller birds, and carrion. It is known to drop shellfish from heights to break them open and will hide food for later consumption.

The Hooded Crow is not currently considered threatened and is classified as Least Concern by the IUCN. It has a large population and an extensive range, with no significant decline observed in recent years.

3-8-2017 BRATISLAVA, SLOVAKIA - BLACK HEADED GULL (Chroicocephalus ridibundus)

The Black-headed gull (Chroicocephalus ridibundus) is a small and one of the most abundant gulls in much of Europe and Asia, and also in eastern Canada. It displays a variety of compelling behaviors and adaptations. Some of these include removing eggshells from one's nest after hatching, begging co-ordination between siblings, differences between sexes, conspecific brood parasitism, and extra-pair paternity.

The summer adult has a chocolate-brown head (not black, although does look black from a distance), a pale grey body, black tips to the primary wing feathers, and a red bill and legs. The hood is lost in winter, leaving just two dark spots. Immature birds have a mottled pattern of brown spots over most of the body and a black band on the tail. There is no difference in plumage between the sexes. In flight, the white leading edge to the wing is a good field mark. First-year birds have a black terminal tail band, more dark areas in the wings, and, in summer, a less fully developed dark hood.

Black-headed gulls breed in much of Europe, Asia, and in coastal eastern Canada. Most of their populations are migratory and winter further south, but some birds reside in the milder westernmost areas of Europe. Some Black-headed gulls also spend the winter in northeastern North America. They breed in large reed beds or marshes, or on islands in lakes, rivers, lagoons, deltas, and estuaries. They may also occur in ponds, canals, and flood lands, nesting on the heather moors, sand dunes, or beaches. During the winter these birds are found in estuaries with sandy or muddy beaches, ploughed fields, moist grasslands, reservoirs, urban parks, farmland, and gardens.

Black-headed gulls are highly gregarious birds, both when feeding or in evening roosts; they also breed in colonies. They are rarely seen at sea far from coasts. Black-headed gulls are active during the day and feed mainly by taking prey from the surface while swimming, or by dipping the head under the surface. They also walk along the coasts and probe for aquatic prey or catch flying insects on the wings. Black-headed birds are noisy, especially in colonies, with a familiar "kree-ar" call. When feeding they utter a sharp “kek-kek”.

3-8-2017 BRATISLAVA, SLOVAKIA - BLACK HEADED GULL (JUVENILE) (Chroicocephalus ridibundus)

The black-headed gull (Chroicocephalus ridibundus) is a small gull that breeds in much of the Palearctic including Europe and also in coastal eastern Canada. Most of the population is migratory and winters further south, but some birds reside in the milder westernmost areas of Europe. The species also occurs in smaller numbers in northeastern North America, where it was formerly known as the common black-headed gull.

The black-headed gull was previously placed in the genus Larus but in agreement with the NACC and SACC, and based on Pons et al. (Pons, J.-M.., A. Hassanin, and P.-A. Crochet. 2005. "Phylogenetic relationships within the Laridae" (Charadriiformes: Aves) inferred from mitochondrial markers, "Molecular Phylogenetics and Evolution" 37: 686-699) and earlier references, extensive changes to the taxonomy of gulls was undertaken and many species of gull were removed from the genus Larus, including the black-headed gull.

The black-headed gull displays a variety of compelling behaviours and adaptations. Some of these include removing eggshells from the nest after hatching, begging co-ordination between siblings, differences between sexes, conspecific brood parasitism, and extra-pair paternity. They are an overwintering species, found in a variety of different habitats.

This gull is 37–44 cm (14+1⁄2–17+1⁄2 in) long with a 94–110 cm (37–43+1⁄2 in) wingspan and weighs 190–400 g (6+3⁄4–14+1⁄8 oz).

In flight, the white leading edge to the wing is a good field mark. The summer adult has a chocolate-brown head (not black, although does look black from a distance), pale grey body, black tips to the primary wing feathers, and red bill and legs. The hood is lost in winter, leaving just two dark spots. Immature birds have a mottled pattern of brown spots over most of the body, and a black band on the tail. There is no difference in plumage between the sexes.

It breeds in colonies in large reed beds or marshes, or on islands in lakes, nesting on the ground. Like most gulls, it is highly gregarious in winter, both when feeding or in evening roosts. It is not a pelagic species and is rarely seen at sea far from coasts.

The black-headed gull is a bold and opportunistic feeder. It eats insects, fish, seeds, worms, scraps, and carrion in towns, or invertebrates in ploughed fields with equal relish. It is a noisy species, especially in colonies, with a familiar "kree-ar" call. Its scientific name means laughing gull.

This species takes two years to reach maturity. First-year birds have a black terminal tail band, more dark areas in the wings, and, in summer, a less fully developed dark hood. Like most gulls, black-headed gulls are long-lived birds, with a maximum age of at least 32.9 years recorded in the wild, in addition to an anecdote now believed of dubious authenticity regarding a 63-year-old bird.

Black-headed gulls can be found over much of Europe. It is also found in across the Palearctic to Japan and east China. Small numbers also breed in northeastern Canada and can be seen in winter in northeast North America as far south as Virginia, often with the similar-looking Bonaparte's Gull and also in some Caribbean islands. Recorded as a very rare transient gull in the Carolina coast. 

5-8-2017 DURNSTEIN, AUSTRIA - EURASIAN BLACKBIRD (FEMALE) (Turdus merula)

The Common blackbird (Turdus merula) is a species of true thrush. It is also called the Eurasian blackbird (especially in North America, to distinguish it from the unrelated New World blackbirds), or simply the blackbird where this does not lead to confusion with a similar-looking local species. This common and conspicuous species has given rise to a number of literary and cultural references, frequently related to its song.

The adult male has glossy black plumage, blackish-brown legs, a yellow eye ring, and an orange-yellow bill. The bill darkens somewhat in winter. The adult female is sooty-brown with a dull yellowish-brownish bill, a brownish-white throat, and some weak mottling on the breast. The juvenile is similar to the female but has pale spots on the upperparts, and the very young juvenile also has a speckled breast. Young birds vary in the shade of brown, with darker birds presumably males. The first-year male resembles the adult male but has a dark bill and weaker eye ring, and its folded wing is brown, rather than black like the body plumage.

Common blackbirds breed in Europe, North Africa, India, and southern China. Populations in the north and east migrate to winter in Egypt and the west and southeast of Asia. Depending on latitude, Common blackbirds may be resident, partially migratory, or fully migratory. These birds live in very varied habitats, including mountainous regions and big city centers, where they inhabit open forests and forest edges, woodlands, cultivated areas, gardens, and parks if the cover is dense enough for hiding.

Common blackbirds are diurnal and eat mainly on the ground, turning the leaf litter to find the invertebrates hidden below. The bird runs for a short distance and stops suddenly to turn its head sideways to detect its prey and hops while it digs the ground with its bill to attract worms. It will feed in trees and bushes on the fruits and berries that it prefers. These birds will often take sunbaths, while flattened on grass or warm ground, with their beak open and their head inclined, and wings and tails spread. Common blackbirds are territorial, strongly defending their territory, mostly in urban areas where each pair does not have much space. Females may also fight, in defense of a good nest site. While winter food is available, Common blackbirds will stay within their territory for the year, although they will occupy different areas. Migrating birds are more gregarious, flying in small flocks and eating in loose groups at the wintering grounds.

2-8-2017 CENTRAL PARK, BUDAPEST - BLACK TAILED PRAIRIE DOG (Cynomys ludovicianus)

The black-tailed prairie dog (Cynomys ludovicianus ) is a rodent of the family Sciuridae found in the Great Plains of North America from about the United States-Canada border to the United States-Mexico border. Unlike some other prairie dogs, these animals do not truly hibernate. The black-tailed prairie dog can be seen above ground in midwinter. A black-tailed prairie dog town in Texas was reported to cover 25,000 sq mi (64,000 km2) and included 400,000,000 individuals. Prior to habitat destruction, the species may have been the most abundant prairie dog in central North America. It was one of two prairie dogs described by the Lewis and Clark Expedition in the journals and diaries of their expedition.

Prairie dogs are named for the dog-like yip they make. In fact, they are fairly big, stout, ground-dwelling squirrels. Black-tailed prairie dogs are generally pinkish-brown to tan on their upperparts and buff to whitish on their lower parts. Their name comes from the distinctive black tip on their short tail. The color of their coat varies slightly as the seasons change, their body hair tipped with black in winter and white in summer. There are no other significant characteristics that separate the genders, although males are usually heavier than females.

Black-tailed prairie dogs occur in the extreme south of central Canada, throughout the United States, and in north-eastern Mexico. They inhabit a fairly limited range of open, arid, level, short-grass prairies. They are often found near river flats and in coulee bottomlands where greasewood, sagebrush, and prickly pear grow. These animals never inhabit moist areas.

2-8-2017 CENTRAL PARK, BUDAPEST - 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.

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.

2-8-2017 DANUBE RIVER, BUDAPEST - MALLARD (FEMALE) (Anas platyrhynchos)

Male Mallards have a dark, iridescent-green head and bright yellow bill. The gray body is sandwiched between a brown breast and black rear. Females and juveniles are mottled brown with orange-and-brown bills. Both sexes have a white-bordered, blue “speculum” patch in the wing.

Unlike larger waterfowl such as the Tundra Swan, which mate for life, Mallard pairs only stay together for a season. Courtship and pair formation begin each fall and winter. Groups of males display for a hen with a variety of behaviors, including head and tail shaking, head-bobbing, dipping, and whistling.

The female Mallard has between five and 14 light green eggs that she incubates for 30 days.

The ducklings are lead to water as soon as their soft, downy feathers are dry. ...

Most Mallard ducks live for one or two years, but some can live as long as 16 years!

Mallards swim with their tail held above the water.

2-8-2017 DANUBE RIVER, BUDAPEST - YELLOW BELLIED SLIDER TERRAPIN (Trachemys scripta.scripta)

The yellow-bellied slider (Trachemys scripta scripta ) is a land and water turtle belonging to the family Emydidae. This subspecies of pond slider is native to the southeastern United States, specifically from Florida to southeastern Virginia, and is the most common turtle species in its range. It is found in a wide variety of habitats, including slow-moving rivers, floodplain swamps, marshes, seasonal wetlands, and permanent ponds. Yellow-bellied sliders are popular as pets.

Adult male yellow-bellied sliders typically reach 5–9 inches (13–23 cm) in length; females range from 8–13 inches (20–33 cm). The carapace (upper shell) is typically brown and black, often with yellow stripes. The skin is olive green with prominent patches of yellow down the neck and legs. As the name implies, the plastron (bottom shell) is mostly yellow with black spots along the edges. Adults tend to grow darker as they age. Yellow-bellied sliders are often confused with eastern river cooters, who also have yellow stripes on the neck and yellow undersides, but the latter lack the green spots characteristic of this species. The yellow belly often has an "s"-shaped yellow stripe on its face. They also have markings shaped like question marks on their bellies. Females of the species reach a larger body size than the males do in the same populations.

Mating can occur in spring, summer, and autumn. They have polygynandrous mating behavior. Courtship consists of biting, foreclaw display, and chasing. Yellow-bellied sliders are capable of interbreeding with other T. scripta subspecies, such as red-eared sliders, which are commonly sold as pets. The release of non-native red-eared sliders into local environments caused the state of Florida to ban the sale of red-eared sliders in order to protect the native population of yellow-bellied sliders.

Yellow-bellied slider movement is highly instigated by dry seasons, where they can be found traveling terrestrially to locate a new water source. One study also found movement is also highly motivated by reproductive recruitment. Differences between male and female movements were observed. Males were more active than females in spring to the end of autumn. Males also exhibited more terrestrial and aquatic movements than females. Finally, long periods of movements were exclusively males.

Mating takes place in the water. Suitable terrestrial area is required for egg-laying by nesting females, who will normally lay 6–10 eggs at a time, with larger females capable of bearing more. The eggs incubate for 2–3 months and the hatchlings will usually stay with the nest through winter. Hatchlings are almost entirely carnivorous, feeding on insects, spiders, crustaceans, tadpoles, fish, and carrion. As they age, adults eat less and less meat, and up to 95% of their nutritional intake eventually comes from plants.

The slider is considered a diurnal turtle; it feeds mainly in the morning and frequently basks on shore, on logs, or while floating, during the rest of the day. At night, it sleeps on the bottom or on the surface near brush piles. Highest densities of sliders occur where algae blooms and aquatic macrophytes are abundant and are of the type that form dense mats at the surface, such as Myriophyllum spicatum and lily pads (Nymphaeaceae). Dense surface vegetation provides cover from predators and supports high densities of aquatic invertebrates and small vertebrates, which offer better foraging than open water.

Some common predators of the yellow-bellied slider include raccoons, opossums, red foxes, and skunks. Other than predators, yellow-bellied sliders are susceptible to respiratory infections which can cause wheezing, drooling, or puffiness in the eyes and is commonly caused by bacteria. Additionally, these turtles can develop fungal spores that can lead to shell rot, they can also develop metabolic bone disease which can stunt the growth of their shells and cause them to be more brittle and prone to damage

The lifespan of yellow-bellied sliders is over 30 years in the wild, and over 40 years in captivity.