Helicops hagmanni

Helicops hagmanni, also known commonly as Hagmann's keelback, is a species of snake in the subfamily Dipsadinae of the family Colubridae. The species is native to the Amazon River basin in South America.

Etymology
The specific name, hagmanni, is in honor of Swiss-Brazilian zoologist Gottfried A. Hagmann.

Geographic range
H. hagmanni is found in Brazil, Colombia, Peru, and Venezuela.

Habitat
The preferred natural habitat of H. hagmanni is freshwater wetlands in forest, at altitudes below 250 m.

Description
H. hagmanni has 21–29 rows of dorsal scales at midbody. Its subcaudal scales are keeled, and number only 50–59. Its teeth are very long and are nonrecurved.

Behavior
H. hagmanni is aquatic.

Diet
H. hagmanni preys upon fishes.

Reproduction
H. hagmanni is ovoviviparous.