Bothrocophias microphthalmus, or the small-eyed toad-headed pit viper, is a species of venomous snake in the family Viperidae.

[2] The species is endemic to northwestern South America.

[3] B. microphthalmus is found in Brazil, Colombia, Ecuador, Peru, and Bolivia.

The type locality is "between Balsa Puerto and Moyobamba, Peru".

[1] The small eyed toad headed pit viper