Chickenhawk (bird) their supposed prey include: duck hawk (peregrine falcon), sparrowhawk (American kestrel), goshawk (northern goshawk), pigeon hawk (merlin), fish hawk (osprey), and quail hawk (Cooper's hawk). Chickenhawk (bird) In the United States, chickenhawk or chicken hawk is an unofficial designation for three species of North American hawks in the family Accipitridae: Cooper's hawk, also called a quail hawk, the sharp-shinned hawk, and the red-tailed hawk. The term "chicken hawk", however, is inaccurate. Although Cooper's and sharp-shinned hawks may attack other birds, chickens do not make up a significant part of their diets; red-tailed hawks have varied diets, but may opportunistically hunt
Passenger pigeon in the Neotropical region of the New World. The cladogram below follows the 2012 DNA study showing the position of the passenger pigeon among its closest relatives: DNA in old museum specimens is often degraded and fragmentary, and passenger pigeon specimens have been used in various studies to discover improved methods of analyzing and assembling genomes from such material. DNA samples are often taken from the toe pads of bird skins in museums, as this can be done without causing significant damage to valuable specimens. The passenger pigeon had no known subspecies. Hybridization occurred between the passenger pigeon and the