Ptyas korros

Ptyas korros, commonly known as the Chinese rat snake or Indo-Chinese rat snake, is a species of colubrid snake endemic to Southeast Asia.

Ptyas korros
Conservation status
Near Threatened  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Suborder:	Serpentes
Family:	Colubridae
Genus:	Ptyas
Species:	P. korros
Binomial name
Ptyas korros (Schlegel, 1837)
Synonyms
Coluber korros Schlegel, 1837 Coryphodon korros — A.M.C. Duméril & Bibron, 1854 Ptyas korros — Cope, 1860 Zamenis korros — Boulenger, 1890 Ptyas korros — Stejneger, 1907 Zamenis korros — Wall, 1908 Liopeltis libertatis Barbour, 1910 Ptyas korros — M.A. Smith, 1943[2][3]

Description

Snout obtuse, projecting; eye very large.^[4] Head broader than neck.^[5] Rostral visible from above; internasals shorter than the prefrontals; frontal as long as its distance from the tip of the snout or a little longer, as long as the parietals; two or three loreals; a large preocular, sometimes touching the frontal; a small subocular below; two postoculars; temporals 2 + 2; eight upper labials, fourth and fifth entering the eye; five lower labials in contact with the anterior chin-shields, which are shorter than the posterior.^[4]

Dorsal scales smooth or feebly keeled on the posterior part of the body, in 15 rows at midbody; ventrals 160–177; anal divided; sub-caudals 122–145.^[4]

Brown or olive above; the scales on the posterior part of the body and on the tail often yellow and edged with black. Lower surface yellow. Young specimens with transverse series of round whitish spots or with narrow yellow transverse bars.^[4][5]

Length of head and body 1,080 mm (43 in); tail 700 mm (28 in).^[4]

Distribution

Nepal, Myanmar; Cambodia, China (Zhejiang, Jiangxi, Fujian, Guangdong, Hainan, Guangxi, Hunan, Yunnan, Hong Kong), Taiwan, India (Assam; Manipur; Arunachal Pradesh (Namdapha - Changlang district, Chessa, Chimpu, Itanagar - Papum Pare district), Tripura, Bangladesh, Indonesia (Sumatra, Borneo, Java, Bali), Laos, Thailand, Vietnam, West Malaysia and Singapore Island.^[4] Found up to 3000 m above sea level.^[5]

Behavior and diet

It is a diurnal species. Both arboreal and terrestrial. Found in forests as well near human habitation. Sleeps on bushes and trees. The diet includes rodents, birds, lizards and frogs. Females lay 4-12 eggs in June-July.^[5]