Thursday, 1 June 2017
31-5-2017 MARJAL DE MOROS, VALENCIA - LITTLE EGRET (Egretta garzetta)
The little egret (Egretta garzetta) is a species of small heron in the family Ardeidae. It is a white bird with a slender black beak, long black legs and, in the western race, yellow feet. As an aquatic bird, it feeds in shallow water and on land, consuming a variety of small creatures. It breeds colonially, often with other species of water birds, making a platform nest of sticks in a tree, bush or reed bed. A clutch of three to five bluish-green eggs is laid and incubated by both parents for about three weeks. The young fledge at about six weeks of age.
Its breeding distribution is in wetlands in warm temperate to tropical parts of Europe, Africa, Asia, and Australia. A successful colonist, its range has gradually expanded north, with stable and self-sustaining populations now present in the United Kingdom.
Little egrets are sociable birds and are often seen in small flocks. They are diurnal birds and feed mainly in the early morning and in the late afternoon. They use a variety of methods to procure their food; they stalk their prey in shallow water, often running with raised wings or shuffling their feet to disturb small fish, or may stand still and wait to ambush prey. Little egrets also make use of opportunities provided by cormorants disturbing fish or humans attracting fish by throwing bread into the water. On land, they walk or run while chasing their prey, feed on creatures disturbed by grazing livestock and ticks on the livestock, and even scavenge occasionally. Little egrets are silent birds in general, however, at their breeding colonies, they make various croaking and bubbling calls. When disturbed, they produce a harsh alarm call.
Little egrets are monogamous. This means that males and females mate only with one partner. They nest in colonies, often with other wading birds. The nests are usually platforms of sticks built in trees or shrubs or in reed beds or bamboo groves. In some locations such as the Cape Verde Islands, these birds nest on cliffs. Pairs defend a small breeding territory, usually extending around 3 to 4 m (10 to 13 ft) from the nest. The female lays 3 to 5 eggs which are incubated by both parents for 21 to 25 days. The eggs are oval in shape and have a pale, non-glossy, blue-green shell color. Upon hatching the chicks are covered in white down feathers and are cared for by both parents. Around 3 weeks after hatching the chicks start to move around the nest and climb into the close branches. They fledge after 40 to 45 days and are able to follow the adults to learn how to feed themselves.
31-5-2017 MARJAL DE MOROS, VALENCIA - OLD WORLD SWALLOWTAIL BUTTERFLY (Papilio machaon)
Papilio machaon, the Old World swallowtail, is a butterfly of the family Papilionidae. The butterfly is also known as the common yellow swallowtail or simply the swallowtail (a common name applied to all members of the family, but this species was the first to be given the name). It is the type species of the genus Papilio. This widespread species is found in much of the Palearctic (it is the only swallowtail in most of Europe) and in North America.
This butterfly is present throughout the entire Palearctic region, ranging from Russia to China and Japan, (including the Himalayas and Taiwan), and across into Alaska, Canada, and the United States, and thus, is not restricted to the Old World, despite the common name. In Asia, it is reported as far south as Saudi Arabia, Oman, the high mountains of Yemen, Lebanon, Iran and Israel. In southern Asia, it occurs in Pakistan and Kashmir, northern India (Sikkim, to Assam, and Arunachal Pradesh), Nepal, Bhutan, and northern Myanmar.
This butterfly is widespread in Europe. In the United Kingdom, it is limited to a few areas in the Norfolk Broads of East Anglia. It is the UK's largest resident butterfly. The monarch (Danaus plexippus) is slightly larger, but is only a rare vagrant.
As P. machaon is widespread throughout Eurasia and often common, it is not threatened as a species. It is listed as "vulnerable" in the South Korean and Austrian Red Data Books, and in the Red Data Book of the former Soviet Union. In Armenia the species demonstrates stable population trend and is assessed as Least Concern.
There are usually two to three broods in a year, but in northern areas, the species may be univoltine. In some places such as the UK, some will pupate and emerge in the same year and others will overwinter as pupae before emerging the following year, a situation known as being partially bivoltine.
The caterpillar spends the first part of its life with the appearance of a bird dropping, an effective defense against predators. As the caterpillar grows larger, it becomes green with black and orange markings. It has a defense against predators in the form of an osmeterium, which consists of retractable, fleshy projections behind its head that can release a foul smell if disturbed, which deters insects, but not birds.
31-5-2017 MARJAL DE MOROS, VALENCIA - LITTLE TERN (Sternula albifrons)
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The little tern (Sternula albifrons ) is a seabird of the family Laridae. It was formerly placed into the genus Sterna, which now is restricted to the large white terns. The genus name is a diminutive of Sterna, "tern". The specific albifrons is from Latin albus, "white", and "frons", forehead. The former North American (S. a. antillarum ) and Red Sea S. a. saundersi subspecies are now considered to be separate species, the least tern (Sternula antillarum ) and Saunders's tern (Sternula saundersi ).
This bird breeds on the coasts and inland waterways of temperate and tropical Europe and Asia. It is strongly migratory, wintering in the subtropical and tropical oceans as far south as South Africa and Australia.
There are three subspecies, the nominate albifrons occurring in Europe to North Africa and western Asia; guineae of western and central Africa; and sinensis of East Asia (SE Russia to Japan, SE Asia, Philippines) and the north and east coasts of Australia and New Guinea
The little tern breeds in colonies on gravel or shingle coasts and islands. It lays two to four eggs on the ground. Like all white terns, it is defensive of its nest and young and will attack intruders.
Like most other white terns, the little tern feeds by plunge-diving for fish, usually from saline environments. The offering of fish by the male to the female is part of the courtship display.
This is a small tern, 21–25 cm long with a 41–47 cm wingspan. It is not likely to be confused with other species, apart from fairy tern and Saunders's tern, because of its size and white forehead in breeding plumage. Its thin sharp bill is yellow with a black tip and its legs are also yellow. In winter, the forehead is more extensively white, the bill is black and the legs duller. The call is a loud and distinctive creaking noise.
The little tern was described by the German naturalist Peter Simon Pallas in 1764 and given the binomial name Sterna albifrons.
31-5-2017 MARJAL DE MOROS, VALENCIA - GREATER FLAMINGO (Phoenicopterus roseus)
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The Greater flamingo (Phoenicopterus roseus) is the most widespread and largest species of the flamingo family. It was described by Peter Simon Pallas in 1811. The Greater flamingo was previously thought to be the same species as the American flamingo, but because of coloring differences of its head, neck, body, and bill, the two flamingos are now most commonly considered separate species.
Greater flamingos have an attractive coloration and appearance. Their feathers are pinkish/white, the wing coverts are red and the primary and secondary flight feathers are black. They have long pink bills with a black tip, yellow eyes and long pink legs. The male is bigger than the female, and juveniles have a gray-brown coloration, with some pink on their underparts, tail and wings, with the legs and beak being mainly brown.
The Greater flamingo inhabits Africa, the Middle East, southern Europe, and the Indian subcontinent. They occur in relatively shallow water bodies, such as saline lagoons, salt pans, large alkaline or saline lakes, and estuaries. Breeding takes place on sandbanks, mudflats, sandy or rocky islands, or open beaches.
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Greater flamingos are very social. They travel in groups numbering up to thousands and they communicate by using visual and auditory cues. Greater flamingos are partially dispersive and migratory. They are traveling constantly, seeking areas with enough resources to sustain the whole flock, especially during the mating season. Greater flamingos keep their chicks together in crèches. Adults supervising crèches tend to act in a hostile way toward hatchlings if their own young are not in that crèche. Greater flamingos are diurnal, feeding during the day. Being bottom feeders, they rely on water levels that are low, and they move to new areas to find appropriate feeding conditions. They often bathe in fresh shallow water and preen their feathers to remove salt from them. They are not territorial birds but during breeding season they do defend their nests.
The Greater flamingo (Phoenicopterus roseus) is the most widespread and largest species of the flamingo family. It was described by Peter Simon Pallas in 1811. The Greater flamingo was previously thought to be the same species as the American flamingo, but because of coloring differences of its head, neck, body, and bill, the two flamingos are now most commonly considered separate species.
Wednesday, 31 May 2017
31-5-2017 MARJAL DE MOROS, VALENCIA - EUROPEAN TURTLE DOVE (Sternula albifrons)
Medium-sized dove with spotted wings, a distinctive striped neck patch and a bold white tip to the rounded tail. Found in wooded and semiopen habitats, especially farmland and heath with hedges and scattered trees. Usually rather shy; seen mainly in flight, but at times perched on utility wires. Feeds on ground, when may associate with other pigeons. Appreciably smaller and slimmer than much commoner and overall paler Eurasian Collared-Dove. Extremely similar in plumage to Oriental Turtle-Dove, but has less extensive dark centers to the wing feathers and averages pinker on the breast.
31-5-2017 MARJAL DE MOROS, VALENCIA - COLLARED PRATINCOLE (Glareola pratincola)
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The Collared Pratincole, known to some as the Common Pratincole or Red-winged Pratincole, is a distinctive wader belonging to the family Glareolidae. This bird is characterized by its short legs, long pointed wings, and a long forked tail. The bill is short, an adaptation for its aerial feeding habits. Adults typically measure 24–28 cm in length with a wingspan of 60–70 cm. The plumage is a blend of brown on the back and head, with a stark white belly. The underwings are a rich chestnut, presenting a darker appearance from below.
To identify the Collared Pratincole, one must look for its chestnut underwings and deeply forked tail. It can be challenging to distinguish from similar species such as the Black-winged Pratincole and the Oriental Pratincole, especially since the latter also possesses chestnut underwings but has a shorter tail.
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The Collared Pratincole thrives in open country and is frequently observed near bodies of water, particularly in the evening as it hunts for insects.
This species graces the warmer regions of Europe, southwest Asia, and Africa with its presence. It is a migratory bird, retreating to tropical Africa to overwinter and is considered a rarity north of its breeding territories.
Pratincoles are unique among waders due to their propensity to capture insect prey on the wing, akin to swallows, though they are also capable of feeding on the ground.
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The Collared Pratincole is a colonial nester, with a preference for laying its eggs in shallow scrapes on open ground, often near water. The clutch consists of 2–4 eggs, which are cream in color with black or dark brown markings. Both parents share the responsibility of incubation, which lasts for 17-19 days, and the young are precocial and nidifugous, leaving the nest within 2–3 days. The fledglings take to the skies after 25–30 days.
The Black-winged Pratincole and Oriental Pratincole are the species most similar to the Collared Pratincole. The key to differentiating them lies in the details of the tail length and underwing coloration.
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The Collared Pratincole's diet consists primarily of insects, which it adeptly catches in flight, demonstrating its aerial agility.
The Collared Pratincole is listed as Least Concern on the IUCN Red List. It is also a species protected under the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA).
31-5-2017 MARJAL DE MOROS, VALENCIA - BLACK WINGED STILT (Himantopus himantopus)
The Black-winged Stilt, Himantopus himantopus, is a slender wader known for its strikingly long, pink legs and contrasting black-and-white plumage. This elegant bird is a member of the avocet and stilt family, Recurvirostridae.
Adult Black-winged Stilts measure 33–36 cm in length. They possess a long, thin black bill and display a distinctive black and white coloration. The head and neck are predominantly white, with variable black markings depending on the sex and subspecies. Males typically have a glossy or greenish sheen on their black backs, while females exhibit a more brownish tinge. During flight, their long legs trail behind, and their wingbeats are steady.
These birds favor marshes, shallow lakes, and ponds as their breeding grounds. They are also known to inhabit coastal areas during migration and in the winter months.
The Black-winged Stilt has a wide range, extending across Europe, Asia, and Africa. Some populations migrate to coastal regions in winter, while others in milder climates may remain resident or engage in short-range movements.
Black-winged Stilts are often seen foraging in shallow waters, gracefully picking insects and crustaceans from the surface. They are known to nest in small groups, sometimes alongside avocets, and exhibit a variety of courtship behaviors, including intricate displays and duets.
The flight call of the Black-winged Stilt is a sharp and clear kleek, typically heard during its aerial maneuvers.
Nests are simple bare spots on the ground near water. These birds are communal nesters and may breed in loose colonies. They have been known to breed as far north as Britain, with recent successful breeding events recorded in Southern and Northern England.
The Black-winged Stilt can be confused with other stilt species, such as the Black-necked Stilt (H. mexicanus) in the Americas, the White-backed Stilt (H. melanurus), and the Pied Stilt (H. leucocephalus) in Australasia and New Zealand.
Their diet consists mainly of insects and crustaceans, which they deftly pick from the water's surface or from wet sand.
The IUCN lists the Black-winged Stilt as Least Concern, indicating a stable global population. However, they are protected under the Agreement on the Conservation of African-Eurasian Migratory Waterbirds, highlighting the importance of international cooperation in their conservation.
31-5-2017 MARJAL DE MOROS, VALENCIA - BLACK WINGED STILT (FEMALE) (Himantopus himantopus)
These birds favor marshes, shallow lakes, and ponds as their breeding grounds. They are also known to inhabit coastal areas during migration and in the winter months.
The Black-winged Stilt has a wide range, extending across Europe, Asia, and Africa. Some populations migrate to coastal regions in winter, while others in milder climates may remain resident or engage in short-range movements.
Black-winged Stilts are often seen foraging in shallow waters, gracefully picking insects and crustaceans from the surface. They are known to nest in small groups, sometimes alongside avocets, and exhibit a variety of courtship behaviors, including intricate displays and duets.
The flight call of the Black-winged Stilt is a sharp and clear kleek, typically heard during its aerial maneuvers.
Nests are simple bare spots on the ground near water. These birds are communal nesters and may breed in loose colonies. They have been known to breed as far north as Britain, with recent successful breeding events recorded in Southern and Northern England.
31-5-2017 MARJAL DE MOROS, VALENCIA - COMMON REDSHANK (Tringa totanus)
The Common Redshank, Tringa totanus, is a Eurasian wader belonging to the large family Scolopacidae. Exhibiting a striking change in plumage, they don a marbled brown color during the breeding season, which transitions to a plainer greyish-brown above and whitish below in the winter. Their legs are a vibrant red, complemented by a black-tipped red bill. In flight, they reveal a distinctive white pattern up the back and on the wings.
To identify the Common Redshank, look for the red legs and the black-tipped red bill, which are characteristic of the species. The white trailing edge on the wings is also a key feature, particularly visible during flight. In breeding plumage, they exhibit a marbled brown coloration, while in winter, they adopt a less patterned greyish-brown and whitish color scheme.
Redshanks are versatile in their choice of wetland habitats, ranging from damp meadows to saltmarshes. They are often found in high densities within these environments.
This species is a widespread breeder across temperate Eurasia and migrates to winter on coasts around the Mediterranean, the Atlantic coast of Europe, and in South Asia. They are occasionally recorded as vagrants in areas such as Micronesia.
The Common Redshank is known for its wariness and its loud, piping call, which can serve as an alarm to other creatures in the vicinity.
Redshanks are not particular about their nesting sites, as long as the location is a wetland. They can nest at high densities and lay clutches of 3–5 eggs.
Their diet consists primarily of small invertebrates, which they forage for in their wetland habitats.
The IUCN considers the Common Redshank to be of Least Concern, indicating a stable population. However, it is listed as Vulnerable in Europe. The species is also protected under the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA).
The Spotted Redshank, T. erythropus, is similar but can be distinguished by its longer bill and legs. In breeding plumage, it is almost entirely black, and in winter, it is very pale, contrasting with the Common Redshank's seasonal coloration.
The Common Redshank's call is a distinctive, loud "teu-teu-teu," often heard as they take to the air in alarm or while in flight.
Tuesday, 30 May 2017
Monday, 29 May 2017
28-5-2017 VILLALONGA RESERVOIR, VALENCIA - YELLOW LEGGED GULL (Larus michahellis)
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The yellow-legged gull is a large gull found in Europe, the Middle East and North Africa, which has only recently achieved wide recognition as a distinct species. It was formerly treated as a subspecies of either the Caspian gull L. cachinnans, or more broadly as a subspecies of the herring gull L. argentatus.The genus name is from Latin Larus which appears to have referred to a gull or other large seabird, and the species name honours the German zoologist Karl Michahelles.
The yellow-legged gull is a large gull, though the size does vary, with the smallest females being scarcely larger than a common gull and the largest males being roughly the size of a great black-backed gull. They range in length from 52 to 68 cm (20 to 27 in) in total length, from 120 to 155 cm (47 to 61 in) in wingspan and from 550 to 1,600 g (1.21 to 3.53 lb) in weight. Among standard measurements, the wing chord is 40.8 to 47.2 cm (16.1 to 18.6 in), the bill is 4.6 to 6 cm (1.8 to 2.4 in) and the tarsus is 5.6 to 7.5 cm (2.2 to 3.0 in). Adults are externally similar to herring gulls but have yellow legs. They have a grey back, slightly darker than herring gulls but lighter than lesser black-backed gulls. They are much whiter-headed in autumn, and have more extensively black wing tips with few white spots, just as lesser black-backed. They have a red spot on the bill as adults, like the entire complex. There is a red ring around the eye like in the lesser black-backed gull but unlike in the herring gull which has a dark yellow ring.
29-5-2017 GENOVES, VALENCIA - COMMON HOUSE MARTIN (Delichon urbicum)
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The Western House Martin (Delichon urbicum), sometimes known as the Common House Martin, is a migratory passerine bird belonging to the swallow family. It is characterized by a blue head and upperparts, a distinctive white rump, and pure white underparts. This species exhibits sexual dimorphism, with both sexes appearing similar, and juveniles displaying a sooty black coloration with white-tipped wing coverts and quills.
Adults measure approximately 13 cm in length, with a wingspan ranging from 26 to 29 cm and an average weight of 18.3 grams. They possess brown eyes, a small black bill, and pink toes and exposed leg parts. The white rump and underparts are particularly noticeable in flight, aiding in distinguishing them from other swallows.
The Western House Martin favors open country with low vegetation, such as pastures, meadows, and farmland, often near water. It is also found in urban areas and can nest in city centers if air quality permits.
This bird breeds across Europe, North Africa, and the Palearctic, migrating to sub-Saharan Africa and tropical Asia for the winter. It is a broad-front migrant, traveling during daylight and feeding on insects in flight.
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The Western House Martin is a social bird, often breeding colonially with nests built in close proximity. It is known for its aerial agility, which it uses to evade predators such as the Eurasian Hobby.
The male's song is a soft twitter of melodious chirps, while the contact call is a hard "chirrrp." The alarm call is a shrill "tseep."
Nests are constructed from mud pellets under eaves or similar overhangs on buildings, usually in colonies. The species is known to produce two broods per year, with four to five white eggs per brood. Juveniles fledge after 22 to 32 days and are fed by parents for about a week thereafter.
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The Western House Martin can be confused with the Asian House Martin (D. dasypus) and the Nepal House Martin (D. nipalense), but it is the only one with a pure white rump and underparts.
The diet consists primarily of insects caught in flight, with a preference for flies and aphids. Hunting typically occurs within 450 meters of the nest and often near open ground or water.
The Western House Martin is classified as Least Concern by the IUCN, with an extensive range and large population. However, there are indications of population fluctuations and declines in certain regions, attributed to factors such as weather, pesticides, and competition for nesting sites.
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