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Photo: Adam Kamal (iNaturalist) · CC BY 4.0 (May be cropped or resized)
Gonyosoma oxycephalum
Range
Southeast Asia
The arboreal ratsnake, also called the red-tailed green rat snake or red-tailed racer, is a species of snake in the family Colubridae, endemic to Southeast Asia. It was first described by Friedrich Boie in 1827 (Wikipedia, general species account).