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Friday, 25 November 2016

23-11-2016 INLE LAKE, MYANMAR - WHITE WAGTAIL (Motacilla alba)


The white wagtail (Motacilla alba) is a small passerine bird in the family Motacillidae, which also includes pipits and longclaws. The species breeds in much of Europe and the Asian Palearctic and parts of North Africa. It has a toehold in Alaska as a scarce breeder. It is resident in the mildest parts of its range, but otherwise migrates to Africa. In Ireland and Great Britain, the darker subspecies, the pied wagtail or water wagtail (M. a. yarrellii) predominates; this is also called in Ireland willie wagtail, not to be confused with the Australian species Rhipidura leucophrys which bears the same common name. In total, there are between 9 and 11 subspecies of M. alba.

The white wagtail is an insectivorous bird of open country, often near habitation and water. It prefers bare areas for feeding, where it can see and pursue its prey. In urban areas it has adapted to foraging on paved areas such as car parks. It nests in crevices in stone walls and similar natural and human-made structures.


It is the national bird of Latvia and has featured on the stamps of several countries. Though it is 'of least concern', there are several threats against it, like being kept as pets and being used as food.

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.

23-11-2016 INLE LAKE, MYANMAR - GREEN MARSH HAWK DRAGONFLY (Orthetrum sabina)


Orthetrum sabina, the slender skimmer or green marsh hawk, is a species of dragonfly in the family Libellulidae. It is widespread, being found from south-eastern Europe and North Africa to Japan and south to Australia and Micronesia.


It is a medium-sized dragonfly with a wingspan of 60-85mm. Adults are grayish to greenish yellow with black and pale markings and green eyes. Its abdomen is greenish-yellow, marked with black. It is very similar to Orthetrum serapia in appearance, with both species appearing in northern Australia. Pale markings on segment four of the abdomen do not extend into the posterior section when viewed from above on Orthetrum sabina. Females are similar to males in shape, color and size; differing only in sexual characteristics. This dragonfly perches motionless on shrubs and dry twigs for long periods. It voraciously preys on smaller butterflies and dragonflies.

Thursday, 24 November 2016

23-11-2016 INLE LAKE, MYANMAR - SCARLET SKIMMER DRAGONFLY (MALE) (Crocothemis servilia)


The scarlet skimmer or ruddy marsh skimmer, Crocothemis servilia, is a species of dragonfly of the family Libellulidae, native to east and southeast Asia and introduced to Jamaica, Florida, and Hawaii.

It is a medium sized blood-red dragonfly with a thin black line along the mid-dorsal abdomen. Its eyes are blood-red above, purple laterally. Thorax is bright ferruginous, often blood-red on dorsum. Abdomen is blood-red, with a narrow black mid-dorsal carina. Anal appendages are blood-red. Female is similar to the male; but with olivaceous-brown thorax and abdomen. The black mid-dorsal carina is rather broad.

It breeds in ponds, ditches, marshes, open swamps and rice fields.

23-11-2016 INLE LAKE, MYANMAR - COMMON TIGER BUTTERFLY (Danaus genutia)


Danaus genutia, the common tiger, is one of the common butterflies of India. It belongs to the "crows and tigers", that is, the Danainae group of the brush-footed butterflies family. The butterfly is also called striped tiger in India to differentiate it from the equally common plain tiger, Danaus chrysippus. The species was first described by Pieter Cramer in 1779.

The butterfly closely resembles the monarch butterfly (Danaus plexippus) of the Americas. The wingspan is 70 to 95 millimetres (2.8 to 3.7 in). Both sexes of the butterfly have tawny wings with veins marked with broad black bands. The male has a pouch on the hindwing. The margins of the wings are black with two rows of white spots. The underside of the wings resembles the upperside but is paler in colouration. The male common tiger has a prominent black-and-white spot on the underside of the hindwing. In drier regions the tawny part of the hindwing pales and approaches white in colour making it very similar to the white tiger (D. melanippus).


D. genutia is distributed throughout India, Sri Lanka, Myanmar and extending to South-East Asia and Australia (except New Guinea). At least in the South Asian part of its range it is fairly common, locally very common.

This butterfly occurs in scrub jungles, fallow land adjacent to habitation, dry and moist deciduous forests, preferring areas of moderate to heavy rainfall. Also occurs in degraded hill slopes and ridges, both, bare or denuded, and, those covered with secondary growth.

While it is a strong flier, it never flies rapidly or high. It has stronger and faster strokes than the plain tiger. The butterfly ranges forth in search of its host and nectar plants. It visits gardens where it nectars on the flowers of Adelocaryum, Cosmos, Celosia, Lantana, Zinnia, and similar flowers.


Members of this genus are leathery, tough to kill and fake death. Since they are unpleasant to smell and taste, they are soon released by the predators, recover and fly off soon thereafter. The butterfly sequesters toxins from plants of the family Asclepiadaceae. The butterflies also congregate with other danaines to sip from the sap of Crotalaria, Heliotropium and other plants which provide the pyrrolizidine alkaloids which they sequester. A study in north-eastern India showed a preference to foraging on Crotalaria juncea compared to Bauhinia purpurea, Barleria cristata rosea and Nerium oleander. To advertise their unpalatability, the butterfly has prominent markings with a striking colour pattern. The striped tiger is mimicked by both sexes of the Indian Tamil lacewing (Cethosia nietneri mahratta) and the leopard lacewing (Cethosia cyane) and females of the common palmfly (Elymnias hypermnestra).

This butterfly lays its egg singly under the leaves of any of its host plants of family Asclepiadaceae. The caterpillar is black and marked with bluish-white and yellow spots and lines. It has three pairs of tentacles on its body. It first eats the eggshell and then proceeds to eat leaves and vegetative parts of the plant. The chrysalis (pupa) is green and marked with golden-yellow spots.

The caterpillar of the common tiger butterfly obtains a supply of poison by eating poisonous plants, which make the caterpillar and butterfly a distasteful morsel for predators. The most common food plants of the common tiger in peninsular India are small herbs, twiners and creepers from the family Asclepiadaceae.

23-11-2016 INLE LAKE, MYANMAR - GREY PANSY BUTTERFLY (Junonia atlites)


Junonia atlites, the grey pansy, is a species of nymphalid butterfly found in South Asia.

Upperside of both sexes pale lavender brown, apical half of wings paler. Forewing: cell with, three transverse, short, sinuous black bands, the outermost defining the discocellulars; a similar short, somewhat broader band beyond the apex of the cell; two transverse discal dusky black fasciae, the inner highly sinuous and outward, angulate above vein 4, the outer straighter, somewhat lunular, bordered by a series of whitish ovals with dusky or black centers. The black-centered spots in the ovals in interspaces 2, 5, and 6 margined posteriorly with rich ocherous yellow. Beyond this series of ovals is a lunular, narrow, transverse dark band, followed by sinuous subterminal and terminal broad dark lines. Apex of wing slightly fuliginous.


Hindwing: a short slender black loop from veins 6 to 4 at apex of cell-area; two discal sinuous transverse dark, fasciae in continuation of those on the forewing: followed by a series of dark-centered ovals in interspaces 2–6, the ovals in interspaces 2, 5, and 6 with the dark centers inwardly broadly bordered with ochreous yellow; postdiscal, subterminal and terminal dark lunular lines as on the forewing.

Underside lilacine white markings as on the upperside but very delicate, slender and somewhat obsolescent. In the dry-season forms of the males the rows of oval ocelli are only indicated by the yellow-centered ovals. The most prominent marking is the inner discal fascia crossing the wings; this is much less sinuous than on the upperside and not angulated on the forewing. In the females the markings are all heavier and more distinct, the space between the various transverse fasciae tinged with ocherous.

J. atlites is found in Bangladesh, India, southern China, Cambodia, Indochina, the Malay Peninsula, western and central Indonesia, and the Philippines.

23-11-2016 INLE LAKE, MYANMAR - GREATER COUCAL (Centropus sinensis)


The Greater coucal (Centropus sinensis) is a large member of the cuckoo order of birds, the Cuculiformes. They are weak fliers and are often seen clambering about in vegetation or walking on the ground as they forage for insects, eggs, and nestlings of other birds. They have a familiar deep resonant call which is associated with omens in many parts of its range.

The head of the Greater coucal is black, upper mantle and underside are black glossed with purple. The back and wings are chestnut brown. There are no pale shaft streaks on the coverts. The eyes are ruby red. Juveniles are duller black with spots on the crown and there are whitish bars on the underside and tail. The males and the females are similar in plumage but females are slightly larger.

Greater coucals occur in the Indian Subcontinent and Southeast Asia. They don't migrate and can be found in mangroves, shrublands, grasslands near rivers, marshes, or creeks. They also frequently visit cultivated areas and rural gardens.

Population size
Unknown
Weight
236-268
goz
g oz 
Length
48-53
cminch
cm inch 

23-11-2016 INLE LAKE, MYANMAR - COMMON MYNA (Acridotheres tristis)


The Common myna (Acridotheres tristis) is a tropical bird with a strong territorial instinct, which has adapted extremely well to urban environments. The range of the Common myna is increasing at such a rapid rate that in 2000 the IUCN Species Survival Commission declared it one of the world's most invasive species and one of only three birds listed among "100 of the World's Worst Invasive Species" that pose a threat to biodiversity, agriculture, and human interests.

Population size
Unknown
Life Span
4-12 years
Top speed
30
km/hmph
km/h mph 
Weight
109-138
goz
g oz 
Length
23
cminch
cm inch 
Wingspan
120-142
mminch

23-11-2016 INLE LAKE, MYANMAR - BROWN SHRIKE (Lanius cristatus)


The brown shrike (Lanius cristatus ) is a bird in the shrike family that is found mainly in Asia. It is closely related to the red-backed shrike (L. collurio ) and isabelline shrike (L. isabellinus ). The genus name, Lanius, is derived from the Latin word for "butcher", and some shrikes are also known as "butcher birds" because of their feeding habits. The specific cristatus is Latin for "crested", used in a broader sense than in English. The common English name "shrike" is from Old English scríc, "shriek", referring to the shrill call.

Like most other shrikes, it has a distinctive black "bandit-mask" through the eye and is found mainly in open scrub habitats, where it perches on the tops of thorny bushes in search of prey. Several populations of this widespread species form distinctive subspecies which breed in temperate Asia and migrate to their winter quarters in tropical Asia. They are sometimes found as vagrants in Europe and North America.


This shrike is mainly brown on the upper parts and the tail is rounded. The black mask can be paler in winter and has a white brow over it. The underside is creamy with rufous flanks and belly. The wings are brown and lack any white "mirror" patches. Females tend to have fine scalloping on the underside and the mask is dark brown and not as well marked as in the male. The distinction is not easy to use in the field but has been tested with breeding birds in Japan where the female can be identified from the presence of a brood patch. The use of multiple measurements allows discrimination of the sex of about 90% of the birds. Subspecies lucionensis has a grey crown shading into the brown upperparts and the rump appears more rufous than the rest of the upper back. The tail is more brownish and not as reddish as in the red-backed shrike. Younger birds of lucionensis have a brown crown and lack the grey on the head. Subspecies superciliosus has a broad white supercilium and a richer reddish crown. The tail is redder and tipped in white.


A number of confusing forms are known from central Asia where the populations of cristatus, isabellinus and collurio overlap. The taxonomy has been in a state of flux and some forms such as phoenicuroides formerly considered as subspecies of L. cristatus have been moved to the species L. isabellinus. Subspecies lucionensis has been recorded interbreeding with superciliosus in Ishikawa, Japan while superciliosus has interbred with Lanius tigrinus in central Japan.

They feed mainly on insects, especially Lepidoptera. Like other shrikes, they impale prey on thorns. Small birds and lizards are also sometimes preyed upon. A white-eye (Zosterops ) has been recorded in its larder. They typically look out for prey from a perch and fly down towards the ground to capture them.


The nominate form breeds in northern Asia from Mongolia to Siberia and winters in South Asia, Myanmar and the Malay Peninsula. The race confusus described from the same region is not well marked but is said to have a wider white brow and paler upperparts and is sometimes included within the nominate population. Subspecies superciliosus (sometimes called the Japanese shrike) breeds on the islands of Sakhalin, Kuril and Japan and winters in Hainan, Sumatra, Java, and the Sundas. Subspecies lucionensis, sometimes known as the Philippine shrike (local names: tarat or pakis-kis ), breeds in Korea and eastern China wintering mainly in Taiwan and the Philippines but also on the Andaman Islands and in peninsular India. Stuart Baker suggested that the species may breed in the Cachar Hills of Assam but the idea was questioned by Claud Buchanan Ticehurst.

This species is rare in Europe and vagrants have been recorded in the United States and Canada.


The brown shrike is a migratory species and ringing studies show that they have high fidelity to their wintering sites, often returning to the same locations each winter. They begin establishing wintering territories shortly after arrival and their loud chattering or rattling calls are distinctive. Birds that arrive early and establish territories appear to have an advantage over those that arrive later in the winter areas. The timing of their migration is very regular with their arrival in winter to India in August and September and departure in April. During their winter period, they go through a premigratory moult. Their song in the winter quarters is faint and somewhat resembles the call of the rosy starling and often includes mimicry of other birds. The beak remains closed when singing and only throat pulsations are visible although the bird moves its tail up and down while singing.

The breeding season is late May or June and the breeding habitat includes the taiga, forest to semi-desert where they build a nest in a tree or bush, laying two to six eggs.

23-11-2016 INLE LAKE, MYANMAR - BLACK SHOULDERED KITE (Genus Elanus)


The Black-winged kite (Elanus caeruleus) is a long-winged raptor best known for its habit of hovering over open grasslands in the manner of the much smaller kestrels. Black-winged kites are well adapted to utilize periodic upsurges in rodent populations and can raise multiple broods in a single year, unlike most birds of prey.

The Black-winged kite is predominantly grey or white with black shoulder patches, wing tips, and eye stripe. Its long falcon-like wings extend beyond the tail when the bird is perched. In flight, the short and square tail is visible and it is not forked as in the typical kites of the genus Milvus. When perched, often on roadside wires, it often adjusts its wings and jerks its tail up and down as if to balance itself. The male and the female look similar. Their large forward-facing eyes placed under a bony shelf that shades them is distinctive; their velvety plumage and zygodactyl feet are characters shared with owls and the genus has been considered as a basal group within the Accipitridae. The inner vanes of the feathers have velvety barbules.

Black-winged kites are found in sub-Saharan Africa and tropical Asia, but they also have a foothold within Europe in Spain and Portugal. Their range expands in southern Europe and possibly in West Asia. Black-winged kites are not migratory, but perform movements in response to weather and food availability. They are said to be winter visitors in some parts of their range such as the Western Ghats. Black-winged kites are primarily birds of open land and semi-deserts. They are mainly seen on plains, and steppes and sometimes occur on grassy slopes of hills in the higher elevation regions of Asia.


Black-winged kites are diurnal birds. They are usually seen singly or in pairs but at night they roost communally with groups of 15 to 35 (larger numbers in Europe) converging at a large leafy tree. They usually hunt flying slowly like harriers, but they will also hover like kestrels. On rare occasions, they can hunt prey in flight. Perches are used for hunting and for feeding but large prey may sometimes be handled on the ground. In southern Africa, they favor roadside verges for foraging. Black-winged kites are extremely silent and the calls recorded include a high-pitched squeal or a soft whistle. They call mainly during the breeding season and at the roost site.

Black-winged kites are monogamous and form pairs. During the breeding season, they become very aggressive and strongly attack intruders. Black-winged kites breed at different times of the year across their range. Although these birds nest throughout the year in India, they appear not to breed in April and May. Males establish territories and defend them from competition. Females move into the territories of males. Courtship is noisy and involves chases. The nest is a loose platform of twigs in which 3 or 4 eggs are laid. The female spends more effort in the construction of the nest than the male. Both parents incubate the eggs for about 25-28 days but when the chicks hatch, the male spends more time hunting. Females initially feed the young, sometimes hunting close to the nest but will also receive food from the male. After fledging the young birds continue to be dependent for food on the male parent for about 80 days. Young birds have reddish-brown feathers on the upperparts and on the breast. The reddish color is derived from porphyrins and is thought to provide the chicks some camouflage. Once breeding is complete females often move on to new territories sometimes deserting before the chicks fledge, leaving males to feed and raise the young. Both males and females show considerable nomadism. Unlike most birds of prey, Black-winged kites can raise multiple broods in a year.

23-11-2016 INLE LAKE, MYANMAR - ASIAN OPENBILL STORK (Anastomus oscitans)


The Asian openbill stork is predominantly greyish (non-breeding season) or white (breeding season) with glossy black wings and tail that have a green or purple sheen. The name is derived from the distinctive gap formed between the recurved lower and arched upper mandible of the beak in adult birds. Young birds do not have this gap. The cutting edges of the mandible have a fine brush like structure that is thought to give them better grip on the shells of snails.[8] The tail consists of twelve feathers and the preen gland has a tuft.[9] The mantle is black and the bill is horn-grey. At a distance, they can appear somewhat like a white stork or Oriental stork. The short legs are pinkish to grey, reddish prior to breeding. Non-breeding birds have a smoky grey wings and back instead of white. Young birds are brownish-grey and have a brownish mantle. Like other storks, the Asian openbill is a broad-winged soaring bird, which relies on moving between thermals of hot air for sustained flight. They are usually found in flocks but single birds are not uncommon. Like all storks, it flies with its neck overstretched. It is relatively small for a stork and stands at 68 cm height (81 cm long).


The usual foraging habitats are inland wetlands and are only rarely seen along river banks and tidal flats. On agricultural landscapes, birds forage in crop fields, irrigation canals, and in seasonal marshes] Birds may move widely in response to habitat conditions. Young birds also disperse widely after fledging. Individuals ringed at Bharatpur in India have been recovered 800 km east and a bird ringed in Thailand has been recovered 1500 km west in Bangladesh. Storks are regularly disoriented by lighthouses along the southeast coast of India on overcast nights between August and September. The species is very rare in the Sind and Punjab regions of Pakistan, but widespread and common in India, Sri Lanka, Nepal, Bangladesh, Myanmar, Thailand and Cambodia. It has recently expanded its range into southwestern China.


During the warmer part of the day, Asian openbills soar on thermals and have a habit of descending rapidly into their feeding areas. Groups may forage together in close proximity in shallow water or marshy ground on which they may walk with a slow and steady gait. The Asian openbill feeds mainly on large molluscs, especially Pila species, and they separate the shell from the body of the snail using the tip of the beak. The tip of the lower mandible of the beak is often twisted to the right. This tip is inserted into the opening of the snail and the body is extracted with the bill still under water. Jerdon noted that they were able to capture snails even when blindfolded. The exact action being difficult to see, led to considerable speculation on the method used. 

Sir Julian Huxley examined the evidence from specimens and literature and came to the conclusion that the bill gap was used like a nutcracker. He held the rough edges of the bill as being the result of wear and tear from such actions. Subsequent studies have dismissed this idea and the rough edge of the bill has been suggested as being an adaptation to help handle hard and slippery shells. They forage for prey by holding their bill tips slightly apart and make rapid vertical jabs in shallow water often with the head and neck partially submerged. The gap in the bill is not used for handling snail shells and forms only with age. Young birds that lack a gap are still able to forage on snails. It has been suggested that the gap allows the tips to strike at a greater angle to increases the force that the tips can apply on snail shells. Smaller snails are often swallowed whole or crushed. They also feed on water snakes, frogs and large insects. When foraging on agricultural landscapes with a variety of habitats, Asian openbills preferentially use natural marshes and lakes (especially in the monsoon and winter), and irrigation canals (especially in the summer) as foraging habitat.


The breeding season is after the rains, during July to September in northern India and Nepal, and November to March in southern India and Sri Lanka. They may skip breeding in drought years. The Asian openbill breeds colonially, building a rough platform of sticks often on half-submerged trees (often Barringtonia, Avicennia and Acacia species), typically laying two to four eggs. The nesting trees are either shared with those of egrets, cormorants and darters, or can be single-species colonies like in lowland Nepal. Nesting colonies are sometimes in highly disturbed areas such as inside villages and on trees located in crop fields. 

In lowland Nepal, 13 colonies found in an agricultural landscape had an average colony size of 52, ranging from 5 nests to 130 nests. The majority of these colonies were located on Bombax ceiba trees, with much fewer located on Ficus religiosa and Dalbergia sissoo tree species. 


Asian openbills preferred trees that were much taller and bigger than trees that were available on the landscape, and selectively used wild and native tree species entirely avoiding species that were important for resources such as fruits (e.g. Mangifera indica) despite such trees being much more common. Religious beliefs have secured important trees such as Ficus species, and agro-forestry has secured the most preferred species, Bombax ceiba, that Asian openbills prefer to locate colonies in lowland Nepal. The nests are close to each other leading to considerable aggressive interactions between birds on neighbouring nests. Both parents take turns in incubation, the eggs hatching after about 25 days. The chicks emerge with cream coloured down and are shaded by the loosely outspread and drooped wings of a parent.


Like other storks, they are silent except for clattering produced by the striking of the male's bill against that of the female during copulation. They also produce low honking notes accompanied by up and down movements of the bill when greeting a partner arriving at the nest. Males may sometimes form polygynous associations, typically with two females which may lay their eggs in the same nest.

Wednesday, 23 November 2016

23-11-2016 INLE LAKE, MYANMAR - YELLOW RUMPED HONEYGUIDE (Indicator xanthonotus)


 The yellow-rumped honeyguide (Indicator xanthonotus) is a sparrow-sized bird in the honeyguide family that is found in Asia, mainly in montane forests along the Himalayas. They are very finch-like but the feet are strong and zygodactyl, with two toes facing forward and two backward. They perch on honeycombs and feed on wax. Males tend to be territorial and stay near honeycombs while females and juveniles forage widely. They are brood parasites, laying their eggs in the nests of tree-hole breeders, possibly barbets.

The species has been recorded from northern Pakistan (Hazara and Murree Hills but the population here may have been extirpated western Uttar Pradesh and Himachal Pradesh extending into Nepal, Sikkim, Arunachal Pradesh and Bhutan (where it is relatively common). It is also found in southeastern Tibet and northern Myanmar. It is found in coniferous and dry-deciduous forest with rocky boulders and cliffs. May make altitudinal movements seasonally.

Monday, 21 November 2016

12-11-2016 MINGUN, MYANMAR - SPOTTED DOVE (Streptopelia chinensis)


The Spotted dove (Spilopelia chinensis) is a small pigeon that is a common across its native range on the Indian subcontinent and in Southeast Asia. These birds are also called the Mountain dove, Pearl-necked dove, Lace-necked dove, and Spotted turtle-dove.

The ground color of this long and slim dove is rosy buff below shading into grey on the head and belly. There is a half collar on the back and sides of the neck made of black feathers that bifurcate and have white spots at the two tips. The median coverts have brown feathers tipped with rufous spots in the Indian and Sri Lankan subspecies which are divided at the tip by a widening grey shaft streak. The wing feathers are dark brown with grey edges. The center of the abdomen and vent are white. The outer tail feathers are tipped in white and become visible when the bird takes off. The male and the female are similar, but juveniles are duller than adults and do not acquire the neck spots until they are mature.


Population size
Unknown
Life Span
8 years
Weight
160
goz
g oz 
Length
28-32
cminch
cm inch 
Wingspan
43-48
cminch
cm inch