Chironius carinatus, commonly known as the machete savane, is a very large, but slender 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...

 snake

Snake

Snakes are elongate, legless, carnivorous reptiles of the suborder Serpentes that can be distinguished from legless lizards by their lack of eyelids and external ears. Like all squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales...

. Although nonvenomous, this snake is well known for its aggressive behaviour.

Geographic range

It is endemic to the Guianas, northern Brazil

Brazil

Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

 to Costa Rica

Costa Rica

Costa Rica , officially the Republic of Costa Rica is a multilingual, multiethnic and multicultural country in Central America, bordered by Nicaragua to the north, Panama to the southeast, the Pacific Ocean to the west and the Caribbean Sea to the east....

, eastern Venezuela

Venezuela

Venezuela , officially called the Bolivarian Republic of Venezuela , is a tropical country on the northern coast of South America. It borders Colombia to the west, Guyana to the east, and Brazil to the south...

, and Trinidad and Tobago

Trinidad and Tobago

Trinidad and Tobago officially the Republic of Trinidad and Tobago is an archipelagic state in the southern Caribbean, lying just off the coast of northeastern Venezuela and south of Grenada in the Lesser Antilles...

.

Description

Chironius carinatus may grow to 3 m (9.8 feet) in total length. Body color can range from brown to deep yellow or gold, with the tail being generally darker than the body. The belly is often a bright shade of yellow or orange. In most specimens, body scales have lightly colored centers with darker edges. A light colored stripe runs down the length of the body, fading at the tail. The dorsal scales are in 12 rows.