published on 3 June 2010 in life

It quivers…but it is not afraid!

The male of the red-eyed tree frog (Agalychnis callidryas) does not quiver because it is afraid, but to defend its territory or its female.
But how does it vibrate? It folds and extends its hind legs quickly and transmits the vibration through the branches of the trees as a warning to ward off intruders. It seems that in the mating season, the vibrations grow exponentially. Michael Caldwell from Boston University was able to record this silent form of communication. The scientist, together with the Smithsonian Tropical Research Institute of Panama, was able to film these small frogs in action.
This form of communication, defined by researchers as “seismic communication”, is also typical of other animals. Elephants, for example, produce threatening vibrations stamping heavily on the ground, while the males of the white-lipped frogs lean their vocal sacs on the ground in order to allow the vibrations of their mouth to propagate through rock or mud.

With the sponsorship of the Italian Ministry of Education, Universities and Research
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