Monday, February 24, 2014

Galapagos Hawk

DNA studies indicate that Galapagos Hawks diverged from a single colonization event by Swainson's Hawks. Consequently their genetic diversity is remarkably low, perhaps lower than in any other bird species (Handbook of the Birds of the World-Alive).

Galapagos Hawks are one of only about a dozen bird species with a cooperative polyandrous mating system. Up to seven unrelated males may copulate with a single female. All the males help with incubation and feeding the one young and also defend a single territory. Monogamous males raise more young per individual, but males in groups live longer than monogamous males.

No comments:

Post a Comment