Ptyas carinata

Ptyas carinata, commonly known as the keeled rat snake,^[2][3] is a species of colubrid snake. It is found in Indonesia, Myanmar, Malaysia, Thailand, Philippines, Cambodia, India, Vietnam, Laos and Singapore.^[4] This little known species is probably the largest extant species in the diverse colubrid family that includes just over half of living snake species. Known adult lengths of snakes of this species in Taiwan measured anywhere from 1.21 to 2.75 m (4 ft 0 in to 9 ft 0 in).^[5] However, the reportedly maximum size was about 4 m (13 ft 1 in).^[6] Males reportedly average slightly larger than females.^[7] They are probably opportunistic predators on a variety of prey, such as rodents, though adult lizards are thought to be significant prey in Indonesia.^[8]

Keeled Rat Snake
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Suborder:	Serpentes
Family:	Colubridae
Genus:	Ptyas
Species:	P. carinatus
Binomial name
Ptyas carinatus (Günther, 1858)
Synonyms
Zaocys (Zapyrus) carinatus - Boettger 1887 Zaocys tenasserimensis - Sclater 1891 Zaocys carinatus — Boulenger 1893 Ptyas carinatus — Wall 1923 Zaocys carinatus — M.A. Smith 1943 Zaocys carinatus — Grandison 1978 Ptyas carinatus — David & Vogel 1996 Zaocys carinatus — Manthey & Grossmann 1997 Ptyas carinatus — Cox et al. 1998 Zaocys carinatus — Grismer et al. 2002 Zaocys carinatus — Rooijen & Rooijen 2002 Ptyas carinatus — Malkmus et al. 2002 Ptyas carinata — David & Das 2004