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Photo: Rainer Breitling (iNaturalist) · CC BY 4.0 (May be cropped or resized)
Ptyas carinata
Range
Indonesia, Myanmar, Malaysia, Thailand, the Philippines, Cambodia, Vietnam, Laos and Singapore
The keeled rat snake, also called king koros, is a species of colubrid snake found in Indonesia, Myanmar, Malaysia, Thailand, the Philippines, Cambodia, Vietnam, Laos and Singapore. This little-known species is probably the largest extant member of the colubrid family, the family that includes just over half of living snake species (Wikipedia, general species account).