Habitat use and time budgeting by wintering ferruginous hawks

Article Abstract:

Little is understood about the behaviour of ferruginous hawks during the winter, with few accounts of habitat use, diet or time-budgeting. A new study of the raptor was undertaken in Colorado to discover its winter ecology. It was found that around 84% of daylight hours were spent perching and that hunting frequency averaged 18 times a day. The hawk's most important prey species was the black-tailed prairie dog.

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Nest site selection and productivity of suburban Red-shouldered Hawks in southern Ohio

Article Abstract:

Research comparing the nesting success rates for suburban and rural Red-shouldered Hawks in southern OH is presented. Reproductive rates were similar at both types of site with 2.6 to 3.1 average nestling survival.

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Daily energy expenditure of nestling Bald Eagles in northern Wisconsin

Article Abstract:

Research is presented concerning the use of double-labelled water to determine the metabolic rate of Bald Eagle nestlings in Wisconsin. The biomass of food consumed by the nestlings is discussed.

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