Dark-eyed Juncos are Michigan's "snowbirds" — trim, slate-gray sparrows with crisp white bellies and white outer tail feathers that flash when they fly. For most of the state they arrive with the first cold fronts of October and depart as spring warms in April, spending the whole winter flicking and scratching beneath feeders.
Juncos breed across Canada's boreal forest — plus Michigan's own Upper Peninsula and northern tip of the Lower — and winter across the U.S. Flocks maintain pecking orders, and a dominance squabble under a feeder, tails flashing white, is one of the classic sights of a Michigan January.
Seeds of weeds and grasses make up the bulk of the winter diet — they're dedicated ground feeders, preferring millet and cracked corn scattered below feeders. On the breeding grounds they switch heavily to insects.
Because for most Michiganders they appear with the first snow and vanish in spring. Their arrival at feeders in October is as reliable a season marker as falling leaves.
Yes — they breed in the Upper Peninsula and the northern Lower Peninsula's conifer forests. In the southern part of the state, though, they're strictly October-to-April birds.
Scatter white millet or cracked corn on the ground or a low platform near brush cover. They rarely use hanging tube feeders — they're ground-scratchers by nature.
The cold months. First birds appear around October, numbers build to a peak from October through April, and the last ones leave in April.
Juveniles are streaked brown and gray and look nothing like the crisp slate-and-white adult, though the white outer tail feathers flash the same way in flight. Most Michigan birders never see this stage, since juncos nest well to the north or in the Upper Peninsula.
Yes — loose winter flocks with a settled pecking order, often the same birds returning to the same yard year after year. Their old name, snowbird, comes from their arrival in Michigan just as the weather turns.
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