Patterns of Prey Abundance and Use by Male and Female Puerto Rican Sharp-Shinned Hawks

摘要

Male Puerto Rican Sharp-Shinned Hawks (Acciptier striatus venator Wetmore) are smaller than females, with a size difference of 23, 34, and 25/100, in bill size, tarsus length, and body mass, respectively. We studied prey availability and diet delivered to nests of this highly dimorphic species in the Maricao Com- Monowealth Forest of Puerto Rico from 1978 to 1982. Thirty-one potential avian prey species (200 g or lesS) Were recorded at a density of 66.7 individuals/ha and a biomass of 1550 g/ha.