- Scales are faintly keeled along several middorsal rows, with 17 scale rows at midbody.
Subcaudal scales and ventral plates bordered in black posteriorly.
Divided anal plate.
- Dorsal scales are black-edged with a yellow spot in the center and a blue base creating the appearance of an overall greenish hue.
Ventral surface white to yellow to green.
Drymobius margaritiferus can reach adult lengths of 75-100 cm (30-40 in).
In North America, Drymobius margaritiferus is found from extreme South Texas along the Gulf Coast into Mexico and Central America.
Drymobius margaritiferus is a diurnal forager and searches damp areas for prey that primarily consists of frogs and toads. It is a fast moving, nonvenomous snake that can be difficult to catch. If captured or cornered, however, this snake can inflict a bite.
Eggs, as many as 8, are deposited anytime from mid-spring to late summer. Incubation lasts about 8 weeks and hatchlings are 15 cm (6 in) long and vividly colored.
Found in dense thickets and palm groves with plenty of plant debris, Drymobius margaritiferus is almost always near a water source.
The speckled racer is listed as threatened by the Texas Parks and Wildlife Department and is protected in the state of Texas.
The single subspecies of Drymobius margaritiferus present in Texas, D. m. margaritiferus, is found in the extreme southern part of the state.