An egg-laying viper
It lays eggs, an unusual trait among American vipers, most of which give birth to live young.
Lachesis acrochorda
Chocoan Bushmaster
Wart-like scales
Its back scales have strongly raised keels. This rough texture explains its Spanish name, verrugosa, or warty.
Senses heat
Between each eye and nostril lies a heat-sensitive pit, useful for locating mammals in low light.
Vibrates without a rattle
It can vibrate its tail in defence. Against dry leaves this makes a sound, although it has no rattle.
Distribution
In Colombia it inhabits Pacific and Magdalena valley forests. It also occurs in Panama and Ecuador.