Cavity-nesting birds in Wisconsin: American kestrel, barred owl, black-backed woodpecker, black-capped chickadee, boreal chickadee, brown creeper, bufflehead, chimney swift, common goldeneye, common merganser, downy woodpecker, Eastern bluebird, Eastern screech-owl, European starling, great-crested flycatcher, hairy woodpecker, hooded merganser, house wren, northern flicker, northern saw-whet owl,  pileated woodpecker, prothonatary warbler, red-bellied woodpecker, red-breasted nuthatch, red-headed woodpecker, tree swallow, tufted titmouse, white-breasted nuthatch, wood duck, and yellow-bellied sapsucker.

Ground-nesting birds in grasslands, young forests, and old-growth: Of the species of birds in Wisconsin that build their nests on the ground, not all build within a forested landscape, but they all need natural ground layers that provide concealment. American woodcock, whip-poor-will, yellow-bellied flycatcher, veery, hermit thrush, Tennessee warbler, Nashville warbler, palm warbler, black-and-white warbler, ovenbird, northern waterthrush, Louisiana waterthrush, Connecticut warbler, mourning warbler, Wilson’s warbler, Canada warbler, rufous-sided towhee, Le Conte’s sparrow, song sparrow, lincoln’s sparrow, white-throated sparrow, dark-eyed junco, sharp-tailed grouse, bobolink , savannah sparrow, northern bobwhite, blue-winged warbler, golden-winged warbler, sedge wren, common nighthawk, killdeer.