- Despite its shiny appearance, Regina rigida has keeled dorsal scales (in 19 rows at midbody).
- Divided anal plate.
- Background color is a shiny olive-brown, with a dull yellow lateral stripe found along the first and second scale rows.
- A thin dark line bisects the lateral stripe.
The ventral surface is usually yellowish with a medially placed double row of pigmented, half-moon shaped spots.
Regina rigida a small species of snake, with adults generally measuring 35.5-61 cm (14-24 in).
Regina rigida is found along the Gulf of Mexico, from Florida and Georgia to the east, to the wetter portions of eastern Texas and Oklahoma; they, however, are not found along the Mississippi Delta in Louisiana.
The non-venomous Regina rigida feeds predominantly on freshly molted crayfish, though a variety of fish, amphibians, and various insects have been documented as food items. Usually only seen above ground during times of heavy rains, R. rigida can also be found by digging into the moist soils under logs, boards, and stones found near the water's edge. They are not known to bite, even when handled by humans. Nocturnal, the activity of this crayfish snake lasts from March to November.
Regina rigida is a live-bearing snake, breeding in the spring and giving birth to young during the summer. The juvenile snakes measure 16.5-23 cm (6.5-9 in) at birth.
The glossy crayfish snake, an uncommonly seen small snake because of its nocturnal feeding habits and subterranean lifestylefound, is exclusively found in the eastern quarter of the state.
The glossy crayfish snake is not a protected species in Texas and can be legally collected with a hunting license.
The single subspecies of Regina rigida found in Texas, R. r. sinicola (the Gulf Crayfish Snake), is a reclusive snake found only in the extreme eastern portions of the state.