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Sunday 26 April 2015

9-4-2015 MUSCAT, OMAN - COMMON SANDPIPER (Actitis hypoleucos)



The common sandpiper (Actitis hypoleucos ) is a small Palearctic wader. This bird and its American sister species, the spotted sandpiper (A. macularia ), make up the genus Actitis. They are parapatric and replace each other geographically; stray birds of either species may settle down with breeders of the other and hybridize. Hybridization has also been reported between the common sandpiper and the green sandpiper, a basal species of the closely related shank genus Tringa.

The adult is 18–20 cm (7.1–7.9 in) long with a 32–35 cm (13–14 in) wingspan. It has greyish-brown upperparts, white underparts, short dark-yellowish legs and feet, and a bill with a pale base and dark tip. In winter plumage, they are duller and have more conspicuous barring on the wings, though this is still only visible at close range. Juveniles are more heavily barred above and have buff edges to the wing feathers.


The common sandpiper breeds across most of temperate and subtropical Europe and Asia, and migrates to Africa, southern Asia and Australia in winter. The eastern edge of its migration route passes by Palau in Micronesia, where hundreds of birds may gather for a stop-over. They depart the Palau region for their breeding quarters around the last week of April to the first week of May.

The common sandpiper forages by sight on the ground or in shallow water, picking up small food items such as insects, crustaceans and other invertebrates; it may even catch insects in flight.

It nests on the ground near freshwater. When threatened, the young may cling to their parent's body to be flown away to safety.


26-4-2015 MONTE CORONA - WHITE WAGTAIL (Motacilla alba)


The White wagtail is a slender bird with the characteristic long, constantly wagging tail of its genus. There are a number of other subspecies, some of which may have arisen because of partial geographical isolation, such as the resident British and Irish form, the pied wagtail M. a. yarrellii, which now also breeds in adjacent areas of the neighbouring European mainland. The Pied wagtail exchanges the grey colour of the nominate form with black (or very dark grey in females), but is otherwise identical in its behaviour. Other subspecies, the validity of some of which is questionable, differ in the colour of the wings, back, and head, or other features. Some races show sexual dimorphism during the breeding season. As many as six subspecies may be present in the wintering ground in India or Southeast Asia and here they can be difficult to distinguish.


White wagtails breed throughout Eurasia, only being absent in the Arctic. They also breed in the mountains of Morocco and western Alaska. These birds are residents in the milder parts of their range such as western Europe and the Mediterranean, but migratory in much of the rest of their range. Northern European breeders winter around the Mediterranean and in tropical and subtropical Africa, and Asiatic birds move to the Middle East, India, and Southeast Asia. Birds from the North American population also winter in tropical Asia. White wagtails occupy a wide range of habitats but are absent from deserts. They inhabit grasslands, seashores, rocky shorelines, sand beaches, tidepools, rivers, lakeshores, farmland, gardens, and parks. They are also often found in towns and villages.

29-3-2015 COCHIN, INDIA - INDIAN POND HERON (Ardeola grayii)


The Indian pond heron or paddybird (Ardeola grayii) is a small heron. It is of Old World origins, breeding in southern Iran and east to the Indian subcontinent, Burma, and Sri Lanka. They are widespread and common but can be easily missed when they stalk prey at the edge of small water-bodies or even when they roost close to human habitations.

They are distinctive when they take off, with bright white wings flashing in contrast to the cryptic streaked olive and brown colours of the body. Their camouflage is so excellent that they can be approached closely before they take to flight, a behaviour which has resulted in folk names and beliefs that the birds are short-sighted or blind.


Indian pond herons are stocky with short necks, short thick bills and buff-brown backs. In summer, adults have long neck feathers. Their appearance is transformed from dull colours when they take to flight and the white of the wings makes them very prominent. They are very similar to the squacco herons, Ardeola ralloides, but darker backed. To the east of their range, they are replaced by the Chinese pond herons, Ardeola bacchus.

During the breeding season, there are records of individuals with red legs. The numbers do not suggest that this is a normal change for adults during the breeding season and some have suggested the possibility of it being genetic variants.

Erythristic plumage has been noted. The race phillipsi has been suggested for the populations found in the Maldives, without much acceptance. It forms a superspecies with the closely related Chinese pond heron, Javan pond heron and the Madagascar pond heron.
They are usually silent but may make a harsh croak in alarm when flushed or near their nests.

This bird was first described by Colonel W. H. Sykes in 1832 and given its scientific name in honour of John Edward Gray. Karyology studies indicate that pond herons have 68 chromosomes. 


They are very common in India, and are usually solitary foragers but numbers of them may sometimes feed in close proximity during the dry seasons when small wetlands have a high concentration of prey. They are semi-colonial breeders. They may also forage at garbage heaps. During dry seasons, they sometimes take to foraging on well watered lawns or even dry grassland. When foraging, they allow close approach and flush only at close range. They sometimes form communal roosts, often in avenue trees over busy urban areas.


The Indian pond heron's feeding habitat is marshy wetlands. They usually feed at the edge of ponds but make extensive use of floating vegetation such as water hyacinth to access deeper water. They may also on occasion swim on water or fish from the air and land in deeper waters. They have also been observed to fly and capture fishes leaping out of water. Sometimes, they fly low over water to drive frogs and fishes towards the shore before settling along the shoreline. They have been noted to pick up crumbs of bread and drop them on the water surface to bait fishes.

The primary food of these birds includes crustaceans, aquatic insects, fishes, tadpoles and sometimes leeches (Herpobdelloides sp.). Outside wetlands, these herons feed on insects (including crickets, dragonflies and bees), fish (Barilius noted as important in a study in Chandigarh) and amphibians.


The breeding season begins with the onset of the monsoons. They nest in small colonies, often with other wading birds, usually on platforms of sticks in trees or shrubs. Most nests are built at a height of about 9 to 10 m in large leafy trees. The nest material is collected by the male while the female builds the nest. Three to five eggs are laid. The eggs hatch asynchronously, taking 18 to 24 days to hatch. Both parents feed the young. Fish are the main diet fed to young. Nest sites that are not disturbed may be reused year after year.


The habit of standing still and flushing only at the last moment has led to widespread folk beliefs that they are semi-blind and their name in many languages includes such suggestions. In Sri Lanka the bird is called kana koka which translates as "half-blind heron" in the Sinhala language. The Hindustani phrase "bagla bhagat" has been used to describe a "wolf in sheep's clothing" or a hypocrite appearing like a meditating saint and occurs in a Marathi proverb. The paddy-bird also appears as a character in the Hitopadesha where, in one story, it takes injury to itself to save a king. The bird was noted by Anglo-Indian naturalist-writers for the surprising transformation in colours. Phil Robinson described the bird as one that sits all dingy gray and flies all white. It is said to have been eaten by many in India in former times.

During the height of the plume trade, feathers were collected from the "paddy bird" and exported to Britain.

Sunday 22 March 2015

23-3-2015 PENANG, MALAYSIA - COMMON FLAMEBACK (Dinopium javanense)


The common flameback (Dinopium javanense), also referred to as the common goldenback, is a small (28–30 cm), three-toed woodpecker in the family Picidae, found throughout South and Southeast Asia.

As shy and secretive birds, common flamebacks are unlikely to be found in urban areas. They live in a variety of habitats, ranging from moist open forests, to scrubs, and mangroves. Although they generally enjoy lowlands, they can reach altitudes of 1700m above sea level in India and in those cases prefer living in pine forests.

Their distribution ranges across Southeast Asia, from the Western Ghats in India to the Indochinese peninsula and several of the Greater Sunda Islands.


 

Saturday 21 March 2015

19-3-2015 JURONG, SINGAPORE - AMERICAN FLAMINGO (Phoenicopterus ruber)


The American flamingo (Phoenicopterus ruber) is a large species of flamingo native to the West Indies, northern South America (including the Galápagos Islands) and the Yucatan Peninsula. It is closely related to the greater flamingo and Chilean flamingo, and was formerly considered conspecific with the greater flamingo, but that treatment is now widely viewed (e.g. by the American and British Ornithologists' Unions) as incorrect due to a lack of evidence. It is also known as the Caribbean flamingo, although it is also present in the Galápagos Islands. It is the only flamingo that naturally inhabits North America.

It is a cultural icon for the U.S. state of Florida, where it was formerly abundant in the southernmost regions, although it was largely extirpated by 1900 and is now only an uncommon visitor with a few small, potential resident populations.


The American flamingo breeds in South America (in the Galápagos Islands of Ecuador, coastal Colombia and Venezuela, and northern Brazil), in the West Indies (Trinidad and Tobago, Cuba, Jamaica, Hispaniola (the Dominican Republic and Haiti), The Bahamas, the Virgin Islands, and the Turks and Caicos Islands), and tropical and subtropical areas of continental North America (along the northern coast of the Yucatán Peninsula in Mexico, and formerly southern Florida in the United States). It is a vagrant to Puerto Rico, Anguilla, Barbados, Honduras, and (following its extirpation) Florida, although some Florida populations are now thought to be year-round residents. The population in the Galápagos Islands differs genetically from that in the Caribbean; the Galápagos flamingos are significantly smaller, exhibit sexual dimorphism in body shape, and lay smaller eggs. They are sometimes separated as Phoenicopterus ruber glyphorhynchus.

Its preferred habitats are similar to those of its relatives: saline lagoons, mudflats, and shallow, brackish coastal or inland lakes. An example habitat is the Petenes mangroves ecoregion of the Yucatán.


Like other flamingo species, American flamingos will migrate short distances to ensure that they get enough food or because their current habitat has been disturbed in some way. One habitat disturbance that has been observed to cause flamingos to leave their feeding grounds is elevated water levels. These conditions make it difficult for Phoenicopterus ruber to wade, hindering their ability to access food. The flamingos will then abandon their feeding grounds in search of an alternate food source. While the flights are not as long as other migratory birds, flamingos still fly for periods without eating.


Mating and bonding behaviors of P. ruber individuals have been extensively studied in captivity. The American flamingo is usually monogamous when selecting a nest site, and incubating and raising young; however, extra-pair copulations are frequent.

While males usually initiate courtship, females control the process. If interest is mutual, a female walks by the male, and if the male is receptive, he walks with her. Both parties make synchronized movements until one member aborts this process. For low-intensity courtships, males and females walk in unison with their heads raised. In high-intensity courtships, males and females walk at a quick pace with their heads dropped in a false feeding posture. This high-intensity courtship stops at any point if either bird turns and the other does not follow, the heads are raised, unison movements are stopped, or the pace of movement is slowed. If the female is ultimately receptive to copulation, she stops walking and presents for the male. Long-term pairs do not frequently engage in courtship behaviors or in-group display. Pairs often stand, sleep, and eat in close proximity.


Courtship is most often seen among individuals that change partners often or are promiscuous. A spectrum of pairing relationships is seen. Some birds have a long-term partner throughout the year; others form pairs during periods of courtship and nest attendance. How long a relationship lasts is affected by many factors, including addition and removal of adults, maturation of juveniles, and occurrence of trios and quartets. In most pairs, both individuals usually construct and defend the nest site. In rare cases, one individual undertakes both duties. Within trios, the dominant pair begins the nesting process by choosing and then defending the site.


Friday 20 March 2015

20-3-2015 BOTANICAL GARDENS, SINGAPORE - YELLOW VENTED BULBUL (Pycnonotus goiavier)


The yellow-vented bulbul (Pycnonotus goiavier), or eastern yellow-vented bulbul, is a member of the bulbul family of passerine birds. It is a resident breeder in southeastern Asia from Indochina to the Philippines. It is found in a wide variety of open habitats but not the deep forest. It is one of the most common birds in cultivated areas. They appear to be nomadic and roam from place to place regularly.

The yellow-vented bulbul was originally classified in the genus Muscicapa.


Wednesday 18 March 2015

19-3-2015 JURONG, SINGAPORE - SILVER EARED MESIA (Leiothrix argentauris)

                              

The silver-eared mesia (Leiothrix argentauris) is a species of bird from South East Asia.
The species is generally resident although it has been reported as a winter migrant to Nameri National Park in Assam, India, which implies that the species may be an altitudinal migrant. The species has been introduced to Hong Kong from captive stock derived from caged birds.

Monday 2 March 2015

2-3-2015 GATA DE GORGOS - IBERIAN SCARCE SWALLOWTAIL BUTTERFLY (Iphiclides feisthamelii)


Iphiclides feisthamelii, the southern scarce swallowtail, southern swallowtail or Iberian scarce swallowtail, is a butterfly found in Italy, Slovenia, southern France, Spain, Portugal, Morocco, Algeria and Tunisia. It is sometimes considered a subspecies of I. podalirius.

The larva feeds on Prunus amygdalus (almond), P. persica (peach), P. insititia (a kind of plum), P. longipes, Pyrus communis (common pear), Malus domesticus (apple) and Crataegus oxyacantha.

The Southern Scarce Swallowtail is a large butterfly that can look either white or pale yellow with prominent vertical black stripes and long tail streamers, from where it gained the common name. When feeding on a flower the blue crescents and red markings on the hindwings are visible. The under wing pattern is a little paler.


Once classed as Iphiclides podalirius podalirius (Central and Southern Europe), The Southern Scarce swallowtail – Iphiclides podalirius feisthamelii (North Africa, Iberia and southwest France) is now recognised as a subspecies due to their geographic location and differences in size and coloration.

The caterpillars can be up to 4.5cm long. They are green with fine yellow lines and orange spots. The shape is deeper in the first third and tapers off sharply. They have a glandular defense system against predation. On their necks is hidden a fork of brightly coloured retractable flesh, when raised this emits a foul smell to deter predators.

Wednesday 25 February 2015

25-2-2015 PEGO MARJAL, ALICANTE - MUSKOVY DUCK (Cairina moschata)


The Muscovy duck (Cairina moschata) is a large duck native to the Americas. Although it is a tropical bird, it adapts well to cooler climates, thriving in weather as cold as −12 °C (10 °F) and able to survive even colder conditions.

Muscovy ducks are large birds. They are predominantly black and white, with the back feathers being iridescent and glossy in males, while the females are more drab. The amount of white on the neck and head is variable, as well as the bill, which can be yellow, pink, black, or any mixture of these. They may have white patches or bars on the wings, which become more noticeable during flight. Both, the males and the females of this species have pink or red wattles around the bill, those of the male being larger and more brightly colored.


Muscovy ducks are found in Mexico and Central and South America. Small wild and feral breeding populations occur in the United States, particularly in Florida, Louisiana, Massachusetts, and the lower Rio Grande Valley of Texas as well as in many other parts of North America, including southern Canada. Feral Muscovy ducks are also found in New Zealand, Australia, and parts of Europe. These birds usually inhabit wet forests, forested swamps, wetlands, lakes, rivers, streams, and nearby grassland and farm crops.

Muscovy ducks are agile and speedy birds. They are non-migratory and are active during the day; at night birds often roost in trees. Days are spent feeding by grazing on the ground or dabbling in shallow water. Muscovy ducks are social birds; they are often seen in pairs or small groups. They are aggressive ducks; males often fight over food, territory, or mates. The females fight with each other less often. Some adults will even peck at the ducklings if they are eating at the same food source. In order to communicate with each other, Muscovy ducks wag their tails, raise and lower their heads and use various vocalizations including hisses and quacks. Males have a low breathy call, and females produce a quiet trilling coo.

Monday 23 February 2015

21-2-2015 RIVER JUCAR, VALENCIA - EURASIAN GREAT CORMORANT (Phalacrocorax carbo)


Great Cormorant is a beautiful bird, widespread throughout the world. Its fishing ability may be as turned to man’s advantage in the Far East, or considered as fish competitor in several other countries and persecuted.

On the head, the chin is black, but cheeks and throat are covered with bare white skin. Head is black with more or less white feathers on the loosely crested nape which is formed by elongated feathers. According to each bird, we can see white short feathers extending broadly on the rear neck and ending in narrower collar on the foreneck.

The thin, straight bill is horn-coloured, with yellow to orange-red gape and hooked tip. The eyes are emerald. The short legs and the webbed feet are black.


Outside breeding season, Great Cormorant looses most of its white feathers and has duller plumage.
Both sexes are similar. Male is slightly larger than female, with larger bill.
Juvenile has brownish neck and white belly, and sometimes mottled pale brown breast, neck and flanks.
Second year resembles adult, but browner.
Young reaches its sexual maturity at 3-5 years.

Monday 2 February 2015

2-2-2015 VILLALONGA SERPIS, VALENCIA - MUSKOVY DUCK (Cairina moschata)


Found at scattered locations across England, and less often in Wales and Scotland, Muscovy Ducks are usually found close to human habitation, prompting they are semi-domesticated or feral.

Very small numbers have been found in Ireland and on the Isle of Man. Records usually relate to single birds or a handful of individuals, but larger groups (in excess of 20 birds) have been reported.