Avian use of habitat configurations created by forest cutting in southeastern Wyoming

Article Abstract:

Forest fragmentations come from timber harvests of old-growth forests. The result is an interspersion of old-growth, clear-cuts and shrubs. Four pairs of test sites, each pair is an uncut and a fragmented site, were chosen in Wyoming. Avian species composition and abundance were compared among the habitat configurations present. Brown creepers, Hermit Thrushes and Red-breasted Nuthatches were negatively affected by fragmented sites. Pine Siskins and Cassin's Finches were abundant in fragmented sites. Fragmentation does not have an over-all significant effect on bird species abundance.

Environmental aspects, Habitat (Ecology), Habitat modification, Forest birds, Old growth forests, Clearcutting

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Bird tolerance to human intrusion in Wyoming montane forests

Article Abstract:

The response of passerine birds to the presence of a human observer was monitored in terms of detectability period and approach distance. Detectability period is the amount of time the bird remains in its initial flush point while approach distance is the distance between the bird and the observer before the bird flees. Tolerance in terms of detectability period is lower when there are fewer conspecifics nearby. It is also lower in terms of approach distance when the bird is conspicuous or near the ground. The implications of these findings on conservation measures are discussed.

Behavior, Human beings, Human-environment interactions, Passeriformes, Perching birds, Alarm responses (Animal behavior), Alarm reaction

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Habitat preferences of pinyon-juniper specialists near the limit of their geographic range

Article Abstract:

Research describing the habitat preferences for five avian species in the juniper woodlands of southwestern Wyoming is presented. The species investigated are Gray Flycatcher, Juniper Titmouse, Bewick's Wren, Blue-gray Gnatcatcher and Black-throated Gray Warbler.

Case studies, Habitats, Ornithological research, Birds, Pinyon pines, Pinon pines

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