Barbour's Cuban Racer

Cubophis brooksi is a large, spotted racer. The four known specimens are all female; the largest has a total length of about 1,360 mm (54 in), with a snout–vent length of up to 855 mm (33.7 in). In preserved specimens the body is grayish black with pale brown spots that enlarge toward the tail. The dorsal scales are smooth and arranged in 17–17–13 rows, with 176–181 ventral scales and a divided anal scale. Males and the hemipenes have not been described.

The species is endemic to Little Swan Island (Isla Pequeña) in the Islas del Cisne, Gracias a Dios, Honduras. It has been recorded in lowland dry forest at about 5 m (16 ft) elevation.

Little is known about the biology of C. brooksi. No feeding has been observed directly; by comparison with its Cuban, Caymanian, and Bahamian relatives, which forage by day, adults are thought to take small birds and young green iguanas, and juveniles to take anoles (Norops nelsoni), as frogs are absent from the islands. The Swan Island hutia, which became extinct around 1960, may formerly have been prey. Reproduction is undocumented, although related species of Cubophis lay clutches of 4–24 eggs.