The Eyelash Palm-pitviper, Bothriechis schlegelii, is reported to be a nocturnal ambush predator that preys upon a wide variety of vertebrates. This study demonstrates that B. schlegelii has a greater temporal activity range than previously documented. Bothriechis schlegelii moves most frequently at night, is capable of capturing mobile prey from daytime perches, and consumes diurnally- and nocturnally-active prey. An ability to consume prey during both night and day increases the importance of the role of B. schlegelii as a predator of small vertebrates.