'Ligre', 'tigon' or 'gallinavo': animals you did not know could reproduce among them

In the world of wild nature, it seems as if the boundaries between species are diluted, thus emerging creatures that seem to be drawn from an ancient myth or from a science fiction novel. They walk, roar, swim or even fly, but they should not exist according to the strict rules of biology.And yet, they exist, although they are very rare to witness.The offspring born of different species are known as 'hybrids', as can be the known mule, arising f…