at least 4 feet long - on path on night walk
Osa Peninsula, Costa Rica
about 3 feet hiding at edge of river near a log
Small snake, under a log at El Remanso
Nadando en el embalse
Keyko Cruz ©
Bothrops asper is a venomous pit viper species ranging from southern Mexico to northern South America. Sometimes referred to as the "ultimate pit viper", these snakes are found in a wide range of lowland habitats, often near human habitations. Its proximity to human habitations is likely the reason why it is considered more dangerous to humans than others. This species is the main cause of snakebite incidents within its range. No subspecies are currently recognized.