Monday, May 25, 2009

Banded Kukri | Oligodon arnensis




Labels: Common Kukri Snake, Banded Kukri

Binomial name: Oligodon arnensis
Common Name: Banded Kukri

Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Colubridae
Genus: Oligodon
Species: O. arnensis


Type: HARMLESS

Distinguishing Features: Small; smooth, lustrous scales; prominent cross bands and characteristic chevron mark on top of the head.

Average Length: 35 cm; At Birth: 8 cm; Maximum: 64 cm.

Description: Banded Kukris are reddish or greyish-brown with 10-12 black or dark brown bands. The top of the head has a distinct arrowhead design. Underneath they are white in appearance. The scales are smooth and glossy, head is thin with a blunt tip, and eyes are round-pupilled. These snakes get their name from their sharp, curved teeth, perfect for holding strong prey such as geckos. Banded Kukris are the most common of the 34 Kukri snakes of Asia. Russell’s Kukri is another common species.

Distribution: Found throughout India. The White-barred Kukri of Assam is found up to 2000 m in the hills.

Habitat: Though they are sometimes found in termite mounds, Banded Kukris like the wolf and cat snakes, are mainly cave, crevice and tree-hole dwellers that find old broken houses especially proper for their occupancy.

Habits: They are out and active on cool rainy nights. This species almost never bites and its main defence is to stiffen and jerk when provoked, similar to Kraits.

Young: Banded Kukris normally lay 3-6 eggs. Baby Kukris appear in Madras in September.

Food: They feed on Geckos, skinks and small mice. They are chiefly fond of birds and reptile eggs. The tiny young ones feed on insects, their larvae and spiders.

Status: This is a fairly common snake, although they are nowhere in plenty. They are often mistaken for Kraitskilled.
and

Saturday, May 23, 2009

Common Wolf Snake | Lycodon aulicus



Binomial name: Lycodon aulicus
Common name: Common Wolf Snake

Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Colubridae
Genus: Lycodon
Species: L. aulicus

Type: HARMLESS

Distinguishing Features: Small, slender, with or without clear cross bands; smooth glittery scales; protruding black eyes.

Average Length
: 30 cm; At Birth: 14 cm; Maximum: 80 cm.

Description: This type of snake is grey, brownish or black with 10-20 thin white or yellow bands. Their jet black eyes protrude slightly and the pupil is invisible. Small ones have translucent skins so that the internal organs can be seen from beneath. The head is flattish and somewhat pointed; the scales are smooth and slightly shimmering. They are small and often brightly marked ‘House Snakes’. Total eight species of Wolf Snakes have been reported in India.

Distribution:
Common Wolf Snakes are found throughout India; including the Andaman and Nicobars, up to over 2000 m in the hills.

Habitat: They live in and around caves, stone piles, hollow trees, under bark and other dry, sheltered places. They easily survive in man-made mud, brick and cement caves because of abundant grub to feed on.

Habits: They are strictly nocturnal and are never seen out during the day time. They are great climbers and can easily cling to fairly smooth walls and tree trunks. Initially they tend to bite with micro-ferocity, when handled. Sometimes a big bite can be quite painful. There long front teeth can be sometime mistaken for fangs.

Young: They lay around
5 to 7 eggs in December to January. The young have bolder and brighter patterns than the adults.

Food:
Adult Common Wolf Snakes prefer skinks and geckos, though they also eat small lizards and frogs. They swallow their prey alive with the aid of their long front teeth which help in gripping it.

Status: They are often mistaken and killed as ‘
Kraits’. Though found commonly, they are nowhere abundant. Their number is reducing, also because of their requirement as specimen in school and colleges.

Red Sand Boa | Eryx johnii



Labels: Smooth Sand Boa, Smooth-scaled Sand Boa, Brown Sand Boa, Red Sand Boa, Two-headed Snake, Black Earth Boa

Binomial name: Eryx johnii
Common name: Red Sand Boa

Scientific classification

Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Boidae
Subfamily: Erycinae
Genus:
Eryx
Species:
E. johnii

Type: HARMLESS

Distinguishing Features: Medium sized, with very blunt tail and head; keeled scales; no definite pattern.

Average Length: 75 cm; At Birth: 22 cm; Maximum: 1 m.

Description: In general the colour of Red Sand Boa varies considerably, from reddish-brown and spectacled-grey or yellowish to black. The thick body is well adapted for burrowing. The Red Sand Boa is one of the oddest looking snakes of India. The shovel-shaped nose and a blunt tail make them appear as if they have been chopped off. This facilitates easy identification of this species. Therefore, they are often called ‘two-headed snakes’ in vernacular languages and are favourites of the snake-charmers.

Distribution: This species is normally found throughout the drier parts of India. Also they are common in Tamil Nadu, Andhra Pradesh and the North-West. It is a plain’s snake.

Habitat: Red Sand Boa prefers sandy places and often lives in rodent burrows.

Habits: Like Common Sand Boa, Red Sand Boa is also a nocturnal snake. They are docile and unlike Common Sand Boas, will not bite when handled. They will just try to hide the head under their body coils. With the head securely tucked under, the boa’s tail may wave about and distract the tormentor.

Young: The female give birth to 6 to 8 living young around June. The young are distinctly banded.

Food: Red Sand Boa’s follow the same diet and pattern of killing their prey as of Common Sand Boa. This snake feeds on other snakes with fair regularity. They are one of the few snakes that can penetrate the blocked burrows of the Mole Rat.

Status: This snake has been lucky enough to have remained off the skin dealer’s list, and also apparently favoured by the ever increasing desert regions of India.

Thursday, May 21, 2009

Common Sand Boa | Eryx conicus



Labels: Rough-scaled Sand Boa, Rough-tailed Sand Boa


Binomial name: Eryx conicus
Common name: Common Sand Boa

Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Family: Boidae
Genus: Eryx
Species: E.conicus

Type: HARMLESS

Distinguishing Features: Short, thick-bodied; keeled scales; very rough tail; prominent, blotched pattern.

Average Length: 50 cm; At Birth: 12.5 cm; Maximum: 1 m (female).

Description: The overall colour of the Common Sand Boa varies from yellowish-white to dark brown, with irregular spots of reddish-brown to black forming an uneven chain down the back. They are short snakes with a very rough tail and a square nose. Seemingly, they resemble the Russells Viper; the spots of the latter however are even and round.

Distribution: They are common throughout India on the plains and low hills but rare or almost absent in most parts of Bengal and Assam.

Habitat: They thrive in sandy soil, rat burrows, brick piles, and rocky areas are favoured.

Habits: Common Sand Boas are mainly nocturnal, and hunt after dark for fresh rodent burrows, with head and neck out of a hole, for a passing rodent. The Common Sand Boas typically hide the head beneath the body when provoked. Though less of a digger than the Red Sand Boa, this snake also prefers sandy soils for effortless burrowing.

Young: Females give birth to 6 to 8 living young’s during the period from May to June. The young are bright replicas of their parents, and somewhat resemble the Saw scaled vipers.

Food: The adults munch on rats, lizards, birds, frogs and toads.

Status: Though effective rodent controllers, Common Sand Boas have been extensively killed for their skins, which are called ‘Baby Python’ by the dealers.

Remarks: In some parts of India it is thoughtlessly believed that the bite or lick of this snake causes leprosy or a similar skin disease. The origin of this story may have been the snake’s spotted skin pattern.

Indian Rock Python | Python molurus


Labels: Indian Python, Black-tailed Python, Rock Python, Ajgar

Binomial name: Python molurus
Common name:
Indian Rock Python

Scientific classification
Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Pythonidae
Genus: Python
Species: P. molurus

Type: HARMLESS

Distinguishing Features: Large, thick-bodied; smooth scales; bright, blotched pattern.

Average Length: 3 m; At Birth: 50 cm; Maximum: 6 m.

Description: Indian Rock Python is a heavy-bodied, smooth-scaled snake with lance-shaped head and short tail. The bright, blotched pattern may be yellowish to dark brown. Pythons of the hill forests of the Western Ghats and Assam are darker, and those of the Deccan and East Coast are usually lighter. The underside is whitish, yellowish or light orange. Pythons have ‘spurs’ which are vestigial legs on either side of the anal vent. These are larger in males. These snakes are equipped with heat sensors, small slits near the nostrils, similar in function to the ‘pits’ of the pit vipers. The other species of Python found in India, the Regal Python (Python reticulatus) grows to over 10 metres and is possibly the largest snake in the world. It is reported from the Nicobars.

Distribution
: These are scattered throughout most of India. Pythons are found in estuarine mangrove forests, arid scrub jungle and the cool dense rain forests up-to 2000 m above sea level.

Habitat: Pythons can adapt in many types of environment but they require large undisturbed areas to hunt and hide in. They live in rocky clefts and caves, abandoned mammal burrows, hollow trees, dense water reed and mangrove thickets. They generally prefer a place near permanent water source.

Habits: This species bask in the sun during the day time. At night, they hang around in search of prey or lie in wet near a water hole or a regular mammal pathway. Very large Pythons seem unwilling to move far and often establish a territory and a preferred residence. After a heavy meal, they become lethargic and may rest for several days or even weeks during digestion.

Young: During the months of March and June, the female lays up-to 100 eggs in a safe undisturbed hole, cave or hollow and remains coiled on them for 60 to 80 days. The size of the eggs is often like the duck eggs, but sometimes it may vary. The female may contract her body muscles rhythmically, thus incubating the clutch, affording temperature and humidity control and protection.

Food: Pythons mainly feed on warm-blooded prey ranging in size from mice and birds to jackal, civets and even deer and wild boar. They stalk prey silently, striking suddenly and tightening around the victim. Pythons do not crush their prey but hamper their respiration and heart beat. There is no authentic case of a human being eaten by one in India. Pythons are extremely valuable predators on agricultural pests.

Status: Pythons are killed throughout their range for their fine skin; thus, this beautiful species is now locally extinct in many areas. They are now partly protected by the Government of India and Python skin export is banned. In Kerala and Tamil Nadu, Poliyars and other tribals eat Python meat and the fat is favoured in many areas for supposed medical uses.

Wednesday, May 20, 2009

Perrotet’s Shieldtail Snake | Plectrurus perroteti

Plectrurus_perottetti

Binomial name: Plectrurus perroteti
Common name: Perrotet’s Shieldtail Snake

Scientific Classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Uropeltidae
Genus: Plectrurus
Species: P. perroteti


Type: HARMLESS

Distinguishing Features: Small; pointed head and blunt tail; smooth, glossy scales; generally brightly marked underside.

Average Length: Up to 44 cm; diameter 11 mm.

Description: Perrotet’s Shieldtail is brown; each scale has a reddish or yellowish centre. The underside of the tail is orange and the young usually have a yellow line on the top of the tail. All uropeltids have powerful, piercing heads and tiny eyes. The tail is short and blunt and ends in two small points. The bright iridescence of these snakes is best seen when the snake is put in sunlight, but is actually due to specializations of the scales that keep the dirt from adhering to it. Shieldtails are often mistaken for earthworms; however, unlike earthworms, almost all species have brightly marked undersides. Perrotet’s Shieldtail is one of the 43 shieldtails or uropeltids of the hills of South and Central India and Sri Lanka.

Distribution: Distributed throughout Western Ghats, South of Goa. According to the M.A. Smith, this species is common in the Nilgiris and Anaimalais. Other species are found at their particular elevation and habitat preferences throughout the Western Ghats. The distribution of these snakes needs significant reconsideration.

Habitat: Uropeltids are forest snakes, occupying tunnel systems generally in the leaves, humus, rocks and logs of most forests, 10-30 cm below the surface of the soil. At drier times of the year they may burrow much deeper.

Habits: Being burrowers, uropeltids spend most of their time underground. They may move to the surface at night and they are found to be active when it rains. These snakes do not bite when handled.

Young: Shieldtails produce 3-5 living young ones.

Food: They apparently feed on earthworms and insect larva.

Status: With the ever-increasing devastation of the hill forests the Shieldtails and countless other smaller, little-known forest creatures are likely to become extinct before we get into deeper study on their biology.

Tuesday, May 19, 2009

Common Worm Snake | Typhlina bramina

Labels: Brahminy blind snake, Common blind snake

Binomial name: Typhlina bramina
Common name: Common Worm Snake

Scientific Classification

Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Typhlopidae
Genus: Typhlina
Species: T. bramina

Type: HARMLESS



Distinguishing Features: Small, wormlike; smooth, shiny scales; blunt head and tail; no definite pattern.

Average Length: 12.5 cm; At Birth: 3.5 cm; Maximum: 17 cm (Beaked Worm Snake: 60 cm).

Description: Common Worm Snakes are reddish-brown or black, and their widely overlapping soft scales have a shining sheen. Superficially they look like earthworms. The tail is similar to the blunt head, but bears a tiny spine; the eyes are barely visible dots and covered by scales. The underside is usually lighter. Magnification is needed to show the scales and tongue to prove them to be miniatures of the snake world. This is the commonest of the 14 species of worm snakes (or blind snakes). They are the smallest of Indian snakes and very little is known about them. Some people call them primitive but these snakes are highly specific for underground survival, and their sensory behaviour and mechanics of movement are of great significance to scientists. Until recently, the scientific name of the Common Worm Snake was Typhlops braminus; then it was discovered that the genus included several subgroups.

Distribution: They are found throughout India including the Andamans. One of the two snakes is reported from Lakshadweep Islands. They originate up-to 1000 m above sea level in Indian ranges.

Habitat: Worm snakes find shelter underground, in ant and termite nests. They also establish themselves under logs, moist leaves and humus in wet forests, dry jungle and even city gardens.

Habits: This species turns out to be all-female and parthenogenetic. In fact, common worm snakes have many rivals and only come to the surface at night. When handed, they give off an unpleasant smelling musk, at the same time poking with their tail-point in a convincing act of ‘mock-stinging’. The musk lets other worm snakes know of their existence and acts as an ant and predator repellent.

Young: This snake lays 5-8 self-fertilized eggs; the time of egg-laying in India is not yet known.

Food: They feed evidently on worms, the soft-bodied larva and eggs of ants and termites, tunnels of which they reside in. Apparently, confined worm snakes at the Madras Snake Park have fed on earth worms.

Status: The distribution and survival of this group of snakes directly reflects soil humidity and temperature. Since deforestation has become extensive in India, it is likely that some of the forest species of worm snakes will not continue to exist.

Remarks: Common Worm Snakes are possibly the world’s most widely distributed snakes. Carried around the world in flower pots (by accident), they have occupied even the snake-less islands like Lakshadweep, New Zealand and Hawaii.