- Vestigial eyes present as two dark spots on either side of head.
Stubby, short tail.
Three scales on top of head between ocular scales.
Single upper labial scale between eye scale and lower nasal scale.
14 rows of smooth scales around body; all scales (belly and dorsal) similar size.
- Gray to pink below and light brown, reddish-brown, or dull pink above.
Adult Leptotyphlops dulcis average 12.5-20 cm (5-8 in); record size is 27 cm (10.5 in).
In the United States, Leptotyphlops dulcis is found from Oklahoma to northern Mexico.
Nocturnal, the plains threadsnake is infrequently found above ground. Soaking rains often force snakes above ground to escape flooded burrows. This species burrows underground in search of its prey. Threadsnakes feed on a variety of invertebrates, ranging from termites and ants (both adults and larvae) to spiders and millipedes.
Females lay eggs (2-7) in June and July. Hatchlings are born about two months later and measure 6-7.5 cm (2.5-3 in) in length.
The plains threadsnake is found in arid regions in places where moisture tends to collect and soil is loose or sandy.
The plains threadsnake is not a protected species in Texas and can be legally collected with a hunting license.
In Texas, the single subspecies of Leptotyphlops dulcis found in the state, L. d. dulcis, is present in the middle third of the state from the Red River to the Mexico border.