The Black and White Warbler can be easier to identify than its more flitting warbler counterparts, as they tend to move headfirst down tree trunks, branches, or occasionally the side of buildings, in search of insect eggs. Their striking black and white streaked pattern is also a distinctive identifier. Males may also have a black chin (breeding) and cheek patch.
Habitat and Nesting
This early-to-arrive warbler (late April in the Twin Cities Metro Area) prefers to nest further north, throughout the Iron Range and further north into Canada. It favors wooded areas, where females will build a cup-shaped nest and lay 4–5 white eggs with brown markings. The female incubates eggs for a period of 10-11 days; nestlings fledge between 9–12 days. Both males and females help to feed the young.
Black and White Warblers are insect eaters, but are occasional visitors to birdbaths during spring and fall migration.