INVESTIGADORES
OJEDA valeria Susana
artículos
Título:
Prey of White-throated Hawks (Buteo albigula) in the southern temperate forests of Argentina
Autor/es:
TREJO, A, V. OJEDA, M. KUN Y S. SEIJAS
Revista:
JOURNAL OF FIELD ORNITHOLOGY
Editorial:
Association of Field Ornithologists
Referencias:
Año: 2006 vol. 77 p. 53 - 57
ISSN:
0273-8570
Resumen:
We examined the diet of White-throated Hawks (Buteo albigula) during the incubation and
nestling periods in the southern temperate forest of Argentina. Pellets (N = 74) and prey remains (N = 59) were
collected at 10 nests from 1998 to 2003, and preys delivered to two nests were monitored during the 20012002
breeding seasons. White-throated Hawks fed on small mammals, birds, lizards, and insects. The three methods of
identifying prey (pellets, prey remains, and direct observation) produced different results. All types of prey except
large birds were detected in pellets, and arthropods may have been over-represented in pellets due to secondary
consumption. No remains of either arthropods or reptiles were identified among prey remains collected at nest
sites and, during nest observations, we were unable to identify many of the prey items delivered by adults. Our
results indicate that accurate determination of the diet of White-throated Hawks requires more than one method
of identifying prey.Buteo albigula) during the incubation and
nestling periods in the southern temperate forest of Argentina. Pellets (N = 74) and prey remains (N = 59) were
collected at 10 nests from 1998 to 2003, and preys delivered to two nests were monitored during the 20012002
breeding seasons. White-throated Hawks fed on small mammals, birds, lizards, and insects. The three methods of
identifying prey (pellets, prey remains, and direct observation) produced different results. All types of prey except
large birds were detected in pellets, and arthropods may have been over-represented in pellets due to secondary
consumption. No remains of either arthropods or reptiles were identified among prey remains collected at nest
sites and, during nest observations, we were unable to identify many of the prey items delivered by adults. Our
results indicate that accurate determination of the diet of White-throated Hawks requires more than one method
of identifying prey.N = 74) and prey remains (N = 59) were
collected at 10 nests from 1998 to 2003, and preys delivered to two nests were monitored during the 20012002
breeding seasons. White-throated Hawks fed on small mammals, birds, lizards, and insects. The three methods of
identifying prey (pellets, prey remains, and direct observation) produced different results. All types of prey except
large birds were detected in pellets, and arthropods may have been over-represented in pellets due to secondary
consumption. No remains of either arthropods or reptiles were identified among prey remains collected at nest
sites and, during nest observations, we were unable to identify many of the prey items delivered by adults. Our
results indicate that accurate determination of the diet of White-throated Hawks requires more than one method
of identifying prey.