Atractus trilineatus, commonly known as the three-lined ground snake, is a species of small burrowing snake in the family Colubridae. The species is native to South America.

Geographic range
A. trilineatus is found in northern South America, including the Caribbean island of Trinidad.

Habitat
The preferred natural habitat of A. trilineatus is forest and savanna, at altitudes from sea level to , but it has also been found in agricultural and horticultural areas.

Description
A. trilineatus may attain a total length of , including a short tail of . Dorsally, it is brown with three or four darker longitudinal stripes; ventrally it is either uniform white, or has a few brown dots. The smooth dorsal scales are in 15 rows, and the anal plate is entire. The ventrals number 125–150, and subcaudals only 11–19.

Diet
A. trilineatus is believed to prey upon soft-bodied insects and earthworms, as well as fish and tadpoles.

Reproduction
A. trilineatus is oviparous. Eggs are layed in March, May and August, and clutch size is three to five eggs.

References

Further reading
Murphy JC, Salvi D, Braswell AL, Jowers MJ (2019). "Phylogenetic Position and Biogeography of Three-Lined Snakes (Atractus trilineatus: Squamata, Dipsadidae) in the Eastern Caribbean". Herpetologica 75 (3): 247–253.
Murphy JC, Salvi D, Braswell AL, Jowers MJ (2020). "Morphology and natural history of three-lined snakes, Atractus trilineatus (Squamata, Dipsadidae), in the Eastern Caribbean". IRCF Reptiles & Amphibians 26: 189–196.
Snyder, Andrew M. (2016). "Atractus trilineatus (Three-lined Ground Snake). Predation". Herpetological Review 47 (2): 308.
Wagler [JG] (1828). "Auszüge aus seinem [sic] Systema Amphibiorum ". Isis von Oken 21: 740–744. (Atractus trilineatus, new species, p. 742 + Plate X, Figures 1–4).

Atractus
Snakes of South America
Snakes of the Caribbean
Reptiles of Brazil
Reptiles of Guyana
Reptiles of Trinidad and Tobago
Reptiles of Venezuela
Reptiles described in 1828
Taxa named by Johann Georg Wagler