Convergence évolutive et apomorphie chez quatre aigles

Convergent evolution is a common theme in the evolution of animals. It occurs when two unrelated species independently evolve similar traits to cope with specific evolutionary challenges. Sometimes convergent evolution is so powerful that creatures that began as entirely different animals start to look almost the same, as is the case with the condors and urubus of the New World and the vultures of the Ancient World. There are hundreds or even thousands of examples of convergent evolution in nature. The wings of pterosaurs, bats, and birds have many similarities in structure, even though they are only very distantly related.
The apormorphy is a trait which characterises an ancestral species and its descendants is called an apomophy.
We present you the case of four large forest-dwelling raptors specialized in hunting arboreal mammals : the Harpy Eagle and the New Guinea Harpy (apomorphy), the Crowned Hawk-eagle and the Philippine Eagle (evolutive convergence).