eWestern BirdsThe Quarterly Journal of Western Field Ornithologists
Vol. 33, No. 4
Western Field Ornithologists
Composition of Raptors on Espíritu Santo Island, Gulf of California, Mexico
Roberto Carmona, Gorgonio Ruiz-campos, José Alfredo Castillo-Guerrero
ABSTRACT: We surveyed raptors on Espíritu Santo Island, Gulf of California,bimonthly from November 1998 to October 1999. Visual surveys averaged 64 hoursper visit. We collected two Elf Owls by mist net. Of the ten species of raptors recorded,five are resident (Turkey Vulture, Osprey, Red-tailed Hawk, Great Horned Owl, andElf Owl), two are common visitors (Peregrine Falcon and American Kestrel), and threeare rare visitors (Northern Harrier, Harris’ Hawk, and Golden Eagle). Four specieswere previously unrecorded on the island (Northern Harrier, Harris’ Hawk, GoldenEagle, and Elf Owl). Of the ten species, three are protected by the Mexicangovernment.