Pandion haliaetus



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Figure 1. Distribution of the Osprey in North America.

This species also overwinters in South America and breeds thoughout much of the Old World. See text for details.

Figure 2. Osprey foraging dive.

Because Ospreys can dive only a meter or less deep, they are restricted to surface-schooling fish, or to those in shallow water. Photo by D. Nill from Schmidt 2001, used with permission.

Figure 3. Annual cycle of breeding, molt, and migration for Ospreys breeding in southern New England.

Phenology of other populations differ (see text). Thick lines show peak activity; thin lines, off-peak.

Figure 4. Osprey chicks often hatch sequentially.

Osprey chicks often hatch up to 4–5 days apart, giving older chicks an advantage when food is limited. Photo by D. Schmidt from Schmidt 2001, used with permission.

Figure 5. Seasonal change in body mass.

Seasonal change in body mass of Ospreys breeding in southern New England. “E” shows data from adults (females above, males below) feeding experimentally enlarged broods. From Poole 1989a; data primarily from individuals weighed electronically at perches.

Recommended Citation

Bierregaard, R. O., A. F. Poole, M. S. Martell, P. Pyle, and M. A. Patten (2016). Osprey (Pandion haliaetus), version 2.0. In The Birds of North America (P. G. Rodewald, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bna.683