All photos © Paul Bertner
These rear-fanged colubrids aren't venomous though they are extremely agile and fast, disappearing into the treetops with any provocation. They display defensive gaping rather than keeping their tongues out when feeling threatened (like their SE Asian counterparts). Photographed in Bilsa reserve, Ecuador. Paul Bertner 2011.
Bilsa reservemachechindulcolubridaevinecamouflagegreendefensive gapingbehaviour