The House Wren is proof that charisma has nothing to do with color: a tiny, plain brown bird with a cocked tail and an outsized voice, delivering a rushing, bubbling cascade of song on repeat from dawn onward, all summer long. They arrive in Michigan in late April and quickly investigate every cavity in the neighborhood.
Male wrens build multiple "dummy" stick nests to offer females and are legendarily fierce about competing cavities — they'll fill unattended nest boxes with sticks and sometimes pierce the eggs of rivals. A backyard with brush, insects, and a box or two will almost always host a pair.
Insects and spiders, full stop — beetles, caterpillars, crickets, and earwigs gleaned from tangles and thickets. They don't visit seed feeders, but a brushy corner of the yard is a wren buffet.
A male House Wren did that. Males fill several cavities with twigs as courtship options and to deny them to competitors; the female picks one and lines a cup at the back.
Late April to early May, and they slip out in September. The song ends earlier, though — by August the yard goes conspicuously quiet.
They can be — wrens sometimes puncture eggs of bluebirds, chickadees, and swallows nesting nearby. Placing boxes away from brushy wren habitat (in open lawn areas) reduces conflicts on a bluebird trail.
Roughly March to November. The heart of the season falls from May through July, and departure is usually more gradual and less noticeable than arrival.
Juveniles are like adults but warmer brown with a scaly-barred forehead and a shorter tail. They leave the nest before they can fly well and hop through low cover while the parents keep feeding them.
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