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Sunday, August 31, 2008

Monkey - Black-footed Gray Langur (Semnopithecus hypoleucos)



Saw this little money sitting on a bed of flower lost in thought as it happily chewed on a twig.

The gray langurs are a group of Old World monkeys and make up the entirety of the genus Semnopithecus.

Gray langurs are large and fairly terrestrial, inhabiting open wooded habitats and urban areas on the Indian subcontinent. Until recently they were considered one species, Semnopithecus entellus; now seven distinct species are recognized.When only one species was recognized, it was also called the Hanuman Langur (named after the Hindu vanara divinity Hanuman), the Common Langur and the Entellus Langur. In Sri Lanka, it is natively known as the Wandura.
They are largely gray, with a black face. In Indian mythology, this is because Hanuman, a monkey warrior, burnt his hands and face trying to rescue Lord Rama's wife. Males are up to 75 cm long, and females 65 cm. Langurs from the southern part of their range are smaller than those from the north.
Gray langurs feed on leaves, fruit, buds and flowers. Their diet, however, is highly seasonable, with mature leaves being eaten only as a fall-back food during the winter months. In the summer, especially before the monsoon season, they are highly frugivorous. They also supplement their diet with insects (up to 25% in some months), tree bark and gum.
Though they sleep in trees, they spend more time on the ground than any other known colobine species. They are diurnal and usually walk on all fours.

They live in medium to large groups, usually with one dominant male. Males do not hold the dominant position for long in a group, with the average being about 18 months. Adolescent males who are expelled from the group sometimes form 'bachelor' packs. These packs, after a time, start to harass the group that expelled them, and challenge the alpha for leadership of the pack. If an attack by a bachelor pack is successful and they are able to kill the alpha, they will engage in a power struggle, where first all of the infants fathered by the previous alpha are killed, and then the bachelors fight among themselves, killing each other until only one remains, who then becomes the leader of the pack.
An interesting relationship has been observed between herds of Chital deer and troops of the Northern Plains Gray Langur (S. entellus), a widespread leaf-eating monkey of South Asia. Chital apparently benefit from the langurs' good eyesight and ability to post a lookout in a treetop, helping to raise the alarm when a predator approaches. For the langurs' part, the Chital's superior sense of smell would seem to assist in early predator warning, and it is common to see langurs foraging on the ground in the presence of Chital. The Chital also benefit from fruits dropped by the langurs from trees such as Terminalia bellerica. Alarm calls of either species can be indicative of the presence of a predator such as the Bengal Tiger.

Tuesday, August 26, 2008

House Crow (Corvus splendens)

A crow is a crow, until you observe it closely, then its actually a pretty amazing bird.

The true crows are large passerine birds that comprise the genus Corvus in the family Corvidae. Ranging in size from the relatively small pigeon-sized jackdaws (Eurasian and Daurian) to the Common Raven of the Holarctic region and Thick-billed Raven of the highlands of Ethiopia, the 40 or so members of this genus occur on all temperate continents (except South America) and several offshore and oceanic islands (including Hawaii).

The crow genus makes up a third of the species in the corvid family. Other corvids include rooks and jays. Crows appear to have evolved in Asia from the corvid stock, which had evolved in Australasia. A group of crows is called a "murder."



Crows make a wide variety of calls or vocalizations. Whether the crows' system of communication constitutes a language is a topic of debate and study. Crows have also been observed to respond to calls of other species; this behavior is presumably learned because it varies regionally. Crows' vocalizations are complex and poorly understood. Some of the many vocalizations that crows make are a "caw", usually echoed back and forth between birds, a series of "caws" in discrete units, counting out numbers, a long caw followed by a series of short caws (usually made when a bird takes off from a perch), an echo-like "eh-aw" sound, and more. These vocalizations vary by species, and within each species vary regionally. In many species, the pattern and number of the numerical vocalizations have been observed to change in response to events in the surroundings (i.e. arrival or departure of crows). Crows can hear sound frequencies lower than those that humans can hear, which complicates the study of their vocalizations.

Loud, throaty "caw-aw-ah"'s are usually used to indicate hunger or to mark territory. When defending a nest site or food, crows will usually enlarge their crest feathers and hunch their shoulders to increase their size. Softer, gurgling sounds have also been observed as a sort of beckoning call, or a call of affection. These noises are emitted from within the throat of the bird, much like a cat's purring.



The House Crow (Corvus splendens), also known as the Colombo Crow is a common Asian bird of the Crow family. It is between the Jackdaw and the Carrion Crow in size (40 cm in length) but is relatively slimmer than either. The forehead, crown, throat and upper breast are a richly glossed black, whilst the neck and breast are a lighter grey-brown in colour. The wings, tail and legs are black. There are regional variations in the thickness of the bill and the depth of colour in areas of the plumage.

It has a widespread distribution in southern Asia, being native to India, Pakistan, Sri Lanka, Maldives and Laccadive Islands, South West Thailand and coastal southern Iran. It has been introduced to East Africa around Zanzibar (around 1897) and Port Sudan, and arrived in Australia via ship but has up to now been exterminated. Recently it has made its arrival in Europe, and has been breeding in the Hook of Holland since 1998. It is associated with human settlements in all of its range, from small villages to large cities.

Due to a human population explosion in the areas it inhabits, this species has also proportionately multiplied. Being an omnivorous scavenger has enabled it to thrive in such circumstances.

The invasive potential for the species is great all over the tropics. It has as yet not established in the New World. This species is able to make use of resources with great flexibility and appears to be associated with humans and no populations are known to exist independently of humans







At least some trees in the local environment seem to be necessary for its successful breeding. It lays 3-6 eggs in a typical stick nest, and occasionally there are several nests in the same tree. In South Asia they are parasitized by the Asian Koel.



Sunday, August 24, 2008

Spotted owl - Athene brama




The Spotted Owlet (Athene brama) is an owl which breeds in tropical Asia from India to Southeast Asia. This species is a part of the larger grouping of owls known as typical owls, Strigidae, which contains most species of owl. The other grouping is the barn owls, Tytonidae.
Spotted Owlet is a common resident bird in open habitats including farmland and human habitation. It nests in a hole in a tree or building, laying 3-5 eggs.
The Spotted Owlet is small (21cm) and stocky. The upperparts are grey-brown, heavily spotted with white. The underparts are white, streaked with brown. The facial disc is pale and the eyes are yellow. There is a white neckband. Sexes are similar. The flight is deeply undulating.
This species is nocturnal but is sometimes seen in the day. It can often be located by the small birds that mob it while it is perched in a tree. It hunts a variety of insects and small vertebrates. The call is a harsh chirurr-chirurr-chirurr.

Sunday, August 10, 2008

Black-rumped Flameback, (Dinopium benghalense) - Adult Male

Side profile

The Black-rumped Flameback, (Dinopium benghalense), also known as the Lesser Golden-backed Woodpecker, is a woodpecker which is a widespread and common resident breeder in much of South Asia.

This flameback is a species associated with open forest and cultivation. It nests in a tree hole, laying three white eggs.

Like other woodpeckers, this species has a straight pointed bill, a stiff tail to provide support against tree trunks, and zygodactyl or “yoked" feet, with two toes pointing forward, and two backward. The long tongue can be darted forward to capture insects.

The Black-rumped Flameback is a large species at 26-29 cm in length. It is a typical woodpecker shape, and has a golden yellow back, with paler wings. The rump and tail are black. The underparts are white with dark chevron markings. The black throat immediately separates it from other golden backed woodpeckers in the Indian region. The head is whitish with a black nape and throat, and there is a greyish eye patch. Unlike Greater Flameback, Chrysocolaptes lucidus, it has no dark moustache stripe.

The adult male Black-rumped Flameback has a red crown. Females have a dark forecrown, with red only on the rear half. Young birds are like the female, but duller.

The Sri Lankan subspecies D. b. psarodes has a crimson back and all the dark markings are blacker and more extensive. It is sometimes considered a separate species from the nominate Indian form.

Thursday, August 7, 2008

Black-rumped Flameback, (Dinopium benghalense) - Adult Male

The Black-rumped Flameback, (Dinopium benghalense), also known as the Lesser Golden-backed Woodpecker, is a woodpecker which is a widespread and common resident breeder in much of South Asia.

This flameback is a species associated with open forest and cultivation. It nests in a tree hole, laying three white eggs.

Like other woodpeckers, this species has a straight pointed bill, a stiff tail to provide support against tree trunks, and zygodactyl or “yoked" feet, with two toes pointing forward, and two backward. The long tongue can be darted forward to capture insects.

The Black-rumped Flameback is a large species at 26-29 cm in length. It is a typical woodpecker shape, and has a golden yellow back, with paler wings. The rump and tail are black. The underparts are white with dark chevron markings. The black throat immediately separates it from other golden backed woodpeckers in the Indian region. The head is whitish with a black nape and throat, and there is a greyish eye patch. Unlike Greater Flameback, Chrysocolaptes lucidus, it has no dark moustache stripe.

The adult male Black-rumped Flameback has a red crown. Females have a dark forecrown, with red only on the rear half. Young birds are like the female, but duller.

The Sri Lankan subspecies D. b. psarodes has a crimson back and all the dark markings are blacker and more extensive. It is sometimes considered a separate species from the nominate Indian form