Distribution, abundance, and habitat characteristics of the buff-breasted flycatcher in Arizona

Article Abstract:

The Buff-breasted Flycatcher is rare and has a patchy distribution in the mountains of southeastern Arizona. Measurements of vegetation structure and floristics were used to create a multivariate statistical model of the habitat of the Buff-breasted Flycatcher. the aim was to determine the location and size of breeding populations and whether the birds are associated with particular coarse-grained vegetations. Significant links between their presence and vegetation type, structural stage, canopy cover and forest patch width, were found.

Habitat (Ecology), Habitats

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The energetics of migration and reproduction of Dusky Canada Geese

Article Abstract:

The energy use patterns of Dusky Canada Geese from premigration to hatchwere studied. Adult female geese were collected by shooting and were subsequently weighed to determine the carcasses' water, potein and lipid contents. The contributions of the exogenous and endogenous lipid and protein to the fowls' estimated daily energy requirements were then assessed for each reproductive period. Results revealed that the geese's use of food for energy and nutrient is most important during the prelaying stage.

Food and nutrition, Geese

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The effect of nest predation on habitat selection by Dusky Flycatchers in limber pine-juniper woodland

Article Abstract:

The habitat selection by Dusky Fkycatchers in limber pine-mountain juniper was studied with respect to the effects of nest predation. The vegetation characteristics of the bird species inhabiting a 40 hectare area in western Wyoming were measured at their respective nest site and in the breeding territory outside the nest patch. Results revealed that the Dusky Flycatchers select nest patches with greater density of trees and snag and greater cover foliage.

Nestlings

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