Puffadder (Bitis arietans). Photo © Johannes van Rooyen · Wikimedia Commons · Public domain
Puffadder (Bitis arietans). Photo © 4028mdk09 · Wikimedia Commons · CC BY-SA 3.0
The puffadder has been found to be odourless – even to the extremely sensitive noses of carnivores such as the domestic dog – when lying immobile.
This scentlessness together with its camouflage makes the snake hard to detect – via olfaction as well as vision – by both prey and predator.
However, an uninvestigated possibility is that the puffadder exhales strong-smelling air when it reacts to confrontation by puffing – shocking predatory mammals enough to give the snake time to escape.
This might explain why the puffing sound after which the species is named seems too soft to do justice to the lethal hazard of the puffadder’s bite.
Puffadder (Bitis arietans). Photo © Julius Rückert · Wikimedia Commons · CC BY-SA 3.0
Robin and the Honey Badger, 22 March 2016