eWestern BirdsThe Quarterly Journal of Western Field Ornithologists
Vol. 40, No. 4
Western Field Ornithologists
Birds of Prey and the Band-tailed Pigeon on Isla Guadalupe, Mexico
Juan-Pablo Gallo-Reynoso and Ana-Luisa Figueroa-Carranza
ABSTRACT: We noted eight species of birds of prey at Isla Guadalupe during ten visits from 1991 to 2003. The most abundant species was the Burrowing owl (Athene cunicularia), found throughout the island; second most numerous was the American kestrel (Falco sparverius), widespread but uncommon. The frequency of the kestrel paralleled the population of mice, peaking 1992, a year of el Niño. We observed the Red-tailed hawk (Buteo jamaicensis), Osprey (Pandion haliaetus), and Peregrine falcon (Falco peregrinus) two or three times each, the prairie falcon (F. mexicanus) once. Our records of the Northern Harrier (Circus cyaneus) and Band-tailed Pigeon (Patagioenas fasciata) are the first for Isla Guadalupe.