Chrysopelea ornata
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| Chrysopelea ornata | ||||||||||||||||
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| Chrysopelea ornata (Shaw, 1802) |
Chrysopelea ornata is a colubrid snake found in South and Southeast Asia. This species is unique in that it is capable of a type of gliding flight. It is also rear-fanged. Currently, three subspecies are recognized, including the typical form described here. The snake's striking looks and capability of gliding make it a popular choice for captivity.
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[edit] Description
Chrysopelea ornata is usually green in color, with black cross-hatching and yellow or gold colored accents. The body, though slender, is far less so than in other tree snakes. It has a flattened head with constricted neck, a blunt nose and large eyes with round pupils.[1]
The lateral, sharp and pronounced keeled condition of the ventrals in association with the normal, not enlarged, vertebral row of scales distinguish this snake. The snakes rarely exceed 40 inches in length, the smallest being measured at 115mm[4] and the largest being 1,360 mm (4 ft 51/2 in) long. The tail is about one-fourth of the total length.[1]
Chrysopelea ornata has two major colour forms, which are largely determined by geographic locality, and their descriptions are given below:[1]
- In Sri Lanka and southern extent of its Indian range, the snake is primarily greenish yellow or pale green. Each scale has a black mesial streak or spot, and is more or less edged with black. The snake also has dark crossbars at intervals. A series of large, flower-shaped, reddish or orange vertebral spots may be present or absent. Ventrals greenish, outside the keel edged with black or spotted. Head black with vellow crossbars and spots. The flower-shaped spots are commoner in Sri Lanka than in south India.
- The second colour variety occurs Southeast Asia lacks the reddish vertebral spots, and has less prominent black crossbars.
[edit] Venom
This species is considered mildly venomous, with no confirmed cases of medically significant envenomation.
[edit] Common names
- English - Golden Tree Snake[1][2][3], Gliding Snake[1], Ornate Flying Snake, Golden Flying Snake, Gold and Black Tree Snake[4], Gliding Snake[1], Flying Tree Snake[5]
- Urdu - Kala jin.[1]
- Sinhala - Pol-mal-karawala, Mal karawala.[1]
- German - Gelbgrüne Schmuckbaumnatter, Gewöhnliche Schmuckbaumnatter.[6]
[edit] Geographic range
India, Sri Lanka, Myanmar, Thailand, western Malaysia, Laos, Cambodia, Vietnam, China (Hong Kong, Hainan, Yunnan), Indonesia (Sumatra, Java, Borneo, Sulawesi), and the Philippines.
In India Chrysopelea ornata ranges from the Western Ghats, up to the Dangs, Katernia Ghat in Uttar Pradesh, North Bihar, northern West Bengal[1] eastwards to Arunachal Pradesh[6]. It is also found in the forests of the Andaman islands.[1]
[edit] Conservation
Not known to be endangered.[5]
[edit] Subspecies
There are three recognized subspecies of C. ornata:
- Chrysopelea ornata ornata (Shaw, 1802)
- Chrysopelea ornata ornatissima (Werner, 1925)
- Chrysopelea ornata sinhaleya (Deraniyagala, 1945)
[edit] Behaviour
Chrysopelea ornata is diurnal and arboreal. The snake's gliding ability, while not as impressive as that of the Paradise Flying Snake (C. paradisi), still makes it capable of moving from tree to tree with relative ease. These snakes are excellent climbers, being able move across even the smallest of branches and even straight up trees with next to no branches by using the edges of rough bark. They tend to be nervous, fast moving snakes, and will attempt to flee if disturbed, but will not generally hesitate to bite if handled. They are mildly venomous, but the venom is not considered to be dangerous to humans.[4] It is intended to assist in subduing fast moving, arboreal prey. C. ornata takes small arboreal prey such as lizards, bats and small rodents [7]. Also reported to take snakes occasionally and to avoid frogs. The snake stalks or pursues the prey and seizes it by the neck which is duly crushed in its strong jaws.[4]
[edit] Flight
Chrysopelea ornata, like others of its genus, glides or parachutes. This is presumably done to cover distances faster, to escape predators, to catch prey, or to move around in forests. Flying snakes usually parachute from tree to tree, but sometimes launch themselves from trees onto the ground. They have been known to cross as much as 100m.[5]
It does this by climbing up to a height, which it does easily by virtue of its keeled belly scales, and then launching itself into mid-air. The snake contracts its ventral surface inwards to form a U-shaped concave depression along the entire length of their bodies, holding the outer edges of the ventral scales rigid. This concave surface acts like a parachute, and increases air resistance allowing the snake to glide forward with the thrust of its launch. The snake undulates through the air, in a swimming-like motion. It holds the tail rigidly upwards and by twisting the tail from side to side, it attains balance. This motion allows it to propel forward, landing clumsily at the end of its flight.[5]
[edit] Reproduction
Breeding habits are little known. The snake is oviparous[6] and six to twelve elongate eggs[1] are laid. Gravid females have been obtained in May and June and hatchlings in June. In Bangkok, according to Smith, pairing takes place in June. Hatchlings measure 114-152 mm (4'/2 to 6 in) in length while the smallest gravid female recorded was 1,093 mm (3 ft 7 in) in length.[1]
[edit] In captivity
In recent years, ornate flying snakes have become increasingly available in the exotic pet trade, many exported from Vietnam and neighboring countries. Instances of captive breeding are virtually unknown. Due to the species' nervous temperament and difficulty to adjusting to captivity, they tend to make poor captives for all but the most experienced reptile keepers. Many imported specimens have heavy parasite loads, and the stress of captivity all too often leads to a quick death.
[edit] References
- ^ a b c d e f g h i j k l m Daniels,J. C. (2002) The Book of Indian Reptiles and Amphibians, BNHS & Oxford University Press, Mumbai, pp 106-107.
- ^ a b Ecology Asia - Snakes of Southeast Asia: page on Golden Tree Snake[1].
- ^ a b Encyclopaedia Brittanica online[2] Accessed 07 Sep 2007
- ^ a b c d Snakes of Sri Lanka website[3]
- ^ a b c d Mangrove flora and fauna of Sungei Buloh Nature Park, Singapore[4]
- ^ a b c The Reptile Database[5] Accessed 08 September 2007.
- ^ Jake Socha's . Flying snake FAQ [6]
[edit] Further reading
- Boulenger, George A. 1890, The Fauna of British India, Including Ceylon and Burma. Reptilia and Batrachia. Taylor & Francis, London, xviii, 541 pp.
- Daniels,J.C. 2002 The Book of Indian Reptiles and Amphibians, BNHS & Oxford University Press, Mumbai.</ref>
- Smith, M.A. 1943. The Fauna of British India, Ceylon and Burma, Including the Whole of the Indo-Chinese Sub-Region. Reptilia and Amphibia. Vol 3 (Serpentes). Taylor and Francis, London. 583 pp.
- Shaw, George 1802. General Zoology, or Systematic Natural History. Vol.3, part 1 + 2. G. Kearsley, Thomas Davison, London: 313-615
[edit] External links
- Chrysopelea at the TIGR Reptile Database.
- Flying Snake Home Page.
- Videos of Chrysopelea ornata flying [7], [8].
