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Providing evidence to improve practice

Individual study: Use of forest stands managed for ruffed grouse Bonasa umbellus by overwintering and breeding bird species at Barrens Grouse Management Area, Pennsylvania, USA

Published source details

Yahner R.H. (1987) Use of even-aged stands by winter and spring bird communities. Wilson Bulletin, 99, 218-232


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Clear or open patches in forests Bird Conservation

A replicated study between December 1981 and June 1984 in a mosaic of aspen Populus spp. and oak Quercus spp. managed for ruffed grouse Bonasa umbellus at Barrens Grouse Management Area, Pennsylvania, USA (Yahner 1987), found that 13 species in winter and 69 species in spring were recorded. In winter, birds were significantly more abundant in the interior of mature aspen (>60 years old) stands than in young (1-3 years since clear-cutting) aspen stands and the edge of intermediate (4-8 years since clear-cutting) aspen stands. In spring, birds were significantly more abundant in intermediate aspen and oak stands (interior and edge) and the interior of mature aspen, than in the interior of mature oak stands and the edge of mature and young aspen stands.