Cloud Forest Parrot Snake

The type specimen of Leptophis modestus is 130 cm (51 in) in total length, and has a 54 cm (21 in) tail. Males of the species can reach lengths of up to 175.5 cm (69.1 in). Dorsally, it is olive-green. There is a blackish streak behind each eye, and the lips and throat are yellowish. Ventrally, it is pale green. The dorsal scales are arranged in 15 rows at midbody, strongly keeled except for the first row (adjacent to the ventrals) and on the tail. Males have 168–178 ventral scales and 171–186 subcaudal scales, while females have 173–183 ventral scales and 166–179 subcaudal scales. The snake's anal plate is divided.

Leptophis modestus can be found in the mountain forests of southern Mexico, central Guatemala, northwestern El Salvador and southwestern Honduras, at elevations of 1,335–2,590 metres (4,380–8,497 ft) The types of forest the snake inhabits include rainforests, humid oak and pine forests, sweetgum forests, evergreen cloud forests and hardwood cloud forests.