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.

Behavior, Colorado, Hawks

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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.

Research, Food and nutrition, Metabolism, Birds, Nestlings, Lake Superior, Bald eagle

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