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Pendulous Nests. Pendulous nests usually have a round or oval nest area with a neck that suspends from the tip of a branch. The neck of a pendulous nest varies in length and width depending on the bird. Different birds create entrance holes in different areas of nest.
BLUEBIRDS, TREE SWALLOWS, WRENS AND CHICKADEE HOUSES. Wrens, bluebirds and tree swallows are the birds most commonly attracted to single-unit, enclosed bird houses. Each species prefers certain locations and habitats in which to nest and rear its young. To attract house wrens and chickadee, place the box very close to or actually in the cover of a bush or small tree.