Habitat selection by the western kingbird in western Nebraska: a hierarchical analysis

Article Abstract:

Habitat selection by the western kingbird in western Nebraska was analyzed using hierarchical analysis. Preferred macrohabitats had fewer but larger trees, resulting in an open canopy with taller ground cover and more shrubs. Maximum canopy height was the only variable significantly different between used and unused habitats. The preferred microhabitats were larger trees which provide a large number of available perches. The western kingbird appears to choose its macrohabitat first, then followed by the selection of territories, nest trees and nest sites.

Habitat selection

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Sex and age differences in risk-taking behavior in house sparrows

Article Abstract:

Both sexes of the House Sparrow (Passer domesticus) do not differ significantly in cover use during most of the breeding season. Relatively more juveniles than adults stay in or close to cover. As juveniles age they become more experienced in predator detection so that they are able to stay farther away from cover. House sparrow form a greater portion of the breeding-season diet of Merlins (Falco columbarius). Merlins normally take juveniles rather than adult House Sparrows.

English sparrow

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The foraging behavior of semipalmated sandpipers in the upper Bay of Fundy: stereotyped or prey-sensitive?

Article Abstract:

The foraging behavior of migrant semipalmated sandpipers in the upper Bay of Fundy was observed to examine foraging behaviors sensitive to prey density. Findings revealed that the semipalmated sandpipers demonstrated a combination of stereotyped and prey-sensitive behaviors across different prey densities. The hypothesis that birds will probe more often as the number of prey increases was supported.

Sandpipers

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