Common names: Baird's rat snake, Baird's ratsnake, Baird's pilot snake, more.

Pantherophis bairdi is a harmless colubrid

Colubrid

A colubrid is a member of the snake family Colubridae. This broad classification of snakes includes about two-thirds of all snake species on earth. The earliest species of the snake family date back to the Oligocene epoch. With 304 genera and 1,938 species, Colubridae is the largest snake family...

 species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 found in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 in the Big Bend region of western Texas

Texas

Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

, as well as in northern Mexico

Mexico

The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

 in Coahuila

Coahuila

Coahuila, formally Coahuila de Zaragoza , officially Estado Libre y Soberano de Coahuila de Zaragoza is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico...

, Nuevo León

Nuevo León

Nuevo León It is located in Northeastern Mexico. It is bordered by the states of Tamaulipas to the north and east, San Luis Potosí to the south, and Coahuila to the west. To the north, Nuevo León has a 15 kilometer stretch of the U.S.-Mexico border adjacent to the U.S...

, and Tamaulipas

Tamaulipas

Tamaulipas officially Estado Libre y Soberano de Tamaulipas is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 43 municipalities and its capital city is Ciudad Victoria. The capital city was named after Guadalupe Victoria, the...

. The species was named in honor of the American zoologist

Zoology

Zoology |zoölogy]]), is the branch of biology that relates to the animal kingdom, including the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct...

 Spencer Fullerton Baird

Spencer Fullerton Baird

Spencer Fullerton Baird was an American ornithologist, ichthyologist and herpetologist. Starting in 1850 he was assistant-secretary and later secretary of the Smithsonian Institution in Washington, D.C...

. No subspecies

Subspecies

Subspecies in biological classification, is either a taxonomic rank subordinate to species, ora taxonomic unit in that rank . A subspecies cannot be recognized in isolation: a species will either be recognized as having no subspecies at all or two or more, never just one...

 are currently recognized.

Description

Adults can reach 25 to 55 inches in length. The color pattern consists of an orange-yellow to bright yellow, or a darker salmon ground color, overlaid with four stripes that run from the neck to the tail. The belly is generally gray to yellow, darkening near the tail.

The primary diet consists of rodents, although they will also prey on birds. Juveniles often eat lizards. They are typically more pleasantly tempered than other rat snake species. They are oviparous, laying a clutch of up to 10 eggs that takes about 3 months to hatch. Prefers semi-arid, rocky habitats.

Common names

Baird's rat snake, Baird's ratsnake, Baird's pilot snake, Baird's Coluber, Great Bend rat snake.

Taxonomy

Pantherophis bairdi has sometimes been considered a subspecies of Pantherophis obsoletus, to which it is closely related.

This species has often been placed in the genus Elaphe, but recent phylogenetic analyses have resulted in its transfer to Pantherophis.

External links

• Elaphe bairdi at Herps of Texas. Accessed 29 November 2008.
• Elaphe bairdi at Bowling Green State University Herp Lab. Accessed 29 November 2008.