Small body + 1⅛" panel
Body sized to 4"×4" floor. The 1⅛" panel locks out larger nest competitors while letting the Winter Wren pass cleanly.
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Troglodytes hiemalis
Tiny brown wren of dark conifer forests, with a stubby upright tail and an absurdly loud bubbling song for a bird that weighs less than a paper clip. The most reliable cue is the song coming from a tangled root mass near a stream.
Widespread and abundant; no known immediate threats to the population.
Its song is one of the longest and most musical in North America, sustained trills lasting up to 10 seconds, delivered by a bird weighing just 9 grams.
Was split from the Eurasian Wren and the Pacific Wren in 2010 based on song and genetic differences; the three are now distinct species.
Tied to fallen logs, root masses, and stream-side tangles in mature conifer forest, habitats that are increasingly rare.
Migrates only short distances and overwinters in southern conifer forests, often found in brush piles in suburban yards.
Breeds across the northern US and boreal Canada in mature conifer forests; winters in the southeastern US.
Breeds across the boreal zone from Manitoba east to Newfoundland and Labrador.
Breeds in mature hemlock and spruce-fir forests of the Appalachians, Adirondacks, and northern New England.
Winters across the southeastern US, especially in dense brushy wetlands and stream corridors.
Body sized to 4"×4" floor. The 1⅛" panel locks out larger nest competitors while letting the Winter Wren pass cleanly.
Builds multiple decoy nests, male may stuff several cavities with moss.