Abstract
I examined abundance, location, and success of avian nests from June through August, 1985-87, in small (1 ha) even-aged aspen (Populus spp.) stands on a 240-ha study area managed as ruffed grouse (Bonasa umbellus) habitat in central Pennsylvania. Ninety-five nests of 14 species, mainly rufous-sided towhee (Pipilo erythrophthalmus) (28.4%) and gray catbird (Dumetella carolinensis) (24.2%), were located. Observed versus expected numbers of total nests (all species combined) and those of towhees and catbirds differed (P 0.05) of stand age and distance from an edge but was inversely related (P 0.5 m above ground level) were more susceptible than lower nests (≤0.5 m) to predators
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