Neotropical whipsnake
Masticophis mentovarius

f5.6 @ 1/800s, ISO:1000, Nikon D3S w 195mm macro

"Masticophis," Wikipedia, the free encyclopedia. Masticophis is a genus of colubrid snakes, commonly referred to as whip snakes or coachwhips, which are endemic to the Americas. Species of Masticophis are found in the United States, Mexico, Central America, and northern South America. They are characterized by having a long, thin body and are not dangerous to humans.Adults of species in the genus Masticophis may attain a total length (including tail) from 152 cm (5 ft) for M. lateralis to 259 cm (8.5 ft) for M. flagellum. A distinctive character of this genus is the shape of the frontal scale (the large scale in the center of the upper surface of the head) which is bell-shaped and elongated. At the rear of the body, the dorsal scales are arranged in only 13 rows.
El Valle de Anton, Panama