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RESULTS AND DISCUSSION
VARIATION IN THE AVIFAUNA OF WOODLOTS
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12 strip-sample methods 79 woodlots accuracy and precision American Goldfinch American Redstart American Woodcock area of trees area per tree avifaunal characteristics bird density bird species diversity census CM CM continuum index correlation Dambach decrease densities of birds density estimates Depth of leaf Eastern Kingbird Ecology effect of grazing Enemar estimates of bird estimates of songbird evaluate forest grazed woodlots Green Lake Counties habitat islands Hairy Woodpecker increase international mapping method leaf litter cm Leopold MacArthur Mean shrub height mesic stands number of animals number of bird number of species observers Ovenbird Percent ground cover population densities Red-bellied Woodpecker Robinette Saplings per hectare Shrubs per hectare songbird density songbird populations southeastern Wisconsin southern Wisconsin species and bird spring-summer Stepwise regression strip methods study area surveys Total basal area Total number Trees per hectare understory Univ variables variation Veery vegetational characteristics Webb Wildl Wildlife Wisconsin woodlots woodlots in southeastern