Unkenreflex is displayed by all amphibians including  Rana macrocnemis to the same degree and is also not entirely limited to poisonous amphibians.
Unkenreflex  interchangeably referred to as unken reflex (Unke is the German word for the genus of fire-bellied toads)  is a defensive posture adopted by several branches of the amphibian class  including salamanders, toads, and certain species of frogs. 
