A very interesting and potentially enlightening topic Baz, thanks for starting it.
In Madagascar there is a common belief that chameleons are the embodiment of evil or malicious spirits. Even seeing one is akin to crossing paths with a black cat in !7th century europe.
In south america, there are people that believe the pacman frog (genus Ceratophrys) has lethally poisonous skin. Their urine will burn the hands of anyone trying to handle them, and that horses drinking from "escuerzo" infested waters will be seized by the mouth and never let go.
In native american cultures, the horned lizard (genus Phrynosoma) plays a multitude of roles ranging from a sign that spring has arrived to a consumer of evil spirits.
Revenge is a dish best served cold...
With a side plate of steaming entrails,
And a nice Bordeaux!