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Journal Article

Utilization of Benthic-Feeding Fish by Inland Breeding Bald Eagles

Dennis D. Haywood and Robert D. Ohmart
The Condor
Vol. 88, No. 1 (Feb., 1986), pp. 35-42
DOI: 10.2307/1367750
Stable URL: http://www.jstor.org/stable/1367750
Page Count: 8

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Topics: Catfish, Foraging, Fish, Freshwater fishes, Carp, Bird nesting, Nesting sites, Breeding, Animal nesting, Biomass
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Utilization of Benthic-Feeding Fish by Inland Breeding Bald Eagles
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Abstract

Prey utilization was investigated at 11 Bald Eagle (Haliaeetus leucocephalus) nests in Arizona over a five-year period beginning in 1978. Visual observations of prey species delivered to the nest and those found in prey remains were in good agreement. Fish, primarily channel catfish (Ictalurus punctatus) and other benthic-feeding fish, composed 77% of the prey items found at the nest. Diurnal timing of capture of fish was not found to vary significantly. Measurement of river-bottom profiles at 22 foraging sites yielded similar physical characteristics. Such characteristics indicate a strong relationship between river-bottom profile and acquisition of benthic-feeding fish by Bald Eagles.

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