
Eastern Kingbird
Migration is over, and most of our birds are engaged in the business of breeding. Though it’s rare for me to find birds nesting on structures that aren’t man-made (e.g. Osprey, phoebes, bluebirds) this year I’ve found two: an American Redstart and an Eastern Kingbird.
While kingbirds are known to nest out in the open, redstarts are usually more secretive, building their nests in the fork of a tree or a shrub at least two metres above the ground. The tightly woven open cup is typically made of grasses, bark strips, hair, leaves, twigs, or mosses, all glued together with spider silk. Male American Redstarts do not attain full breeding plumage until their second year and, while they may sing and defend small territories in their first year, they typically do not find a mate. Once they have attained breeding plumage, some males will mate with two females at the same time. These males hold two separate territories up to 500 metres (1,640 ft) apart. Once his first mate has finished laying all her eggs has begun incubating them, the male proceeds to attract a second mate in his other territory.
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