Foraging by a Red-tailed Hawk along a Wetland Edge: How Large a Duck can be Captured?

JOSEPH R. JEHL

doi:10.1676/04-040

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JOSEPH R. JEHL^*,**,***

^*Div. of Birds, U.S. National Museum of Natural History, Smithsonian Inst., Washington, DC 20560, USA
^**Hawk Mountain Sanctuary, Acopian Center, 410 Summer Valley Rd., Orwigsburg, PA 17961, USA
^***Current address: 2752 Poplar Ln., Annapolis, MD 21401, USA; grebe5k@cs.com

Abstract

A Red-tailed Hawk (Buteo jamaicensis; estimated mass 1,000–1,200 g) failed to kill a Red-breasted Merganser (Mergus serrator; estimated mass 1,150 g) that it captured in shallow water (<25 cm), but evidently dispatched a starving Red-necked Grebe (Podiceps grisegena; mass 645–660 g). These observations are pertinent to estimating the upper mass limit for successful foraging in water.

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JOSEPH R. JEHL "Foraging by a Red-tailed Hawk along a Wetland Edge: How Large a Duck can be Captured?," The Wilson Bulletin 116(4), 354-356, (1 December 2004). https://doi.org/10.1676/04-040

Received: 9 April 2004; Accepted: 1 September 2004; Published: 1 December 2004

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