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Adult. Photo: William Sherman/iStock
Helmitheros vermivorum
Conservation status | Has disappeared from some areas with clearing of forest. Current numbers probably stable. Will become more vulnerable to parasitism by cowbirds where forest is broken up into smaller patches. |
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Family | Wood Warblers |
Habitat | Leafy wooded slopes. During breeding season, frequents dense deciduous woodlands. Prefers cool, shaded banks, sheer gullies and steep, forested slopes covered with medium-sized trees and an undergrowth of saplings and shrubs. In winter in the tropics, forages alone in dense thickets or in the forest undergrowth, usually near the ground. |
Forages mostly in trees and shrubs. Probes in curled, dead leaves for insects, and searches on bark of trunks and limbs. Forages also on the ground, walking while seeking insects on the leaf-litter.
4-5, sometimes 3-6. White, with brown spots and blotches. Incubated by female alone, 13 days. In most areas, rarely parasitized by cowbirds, possibly because it breeds mainly in dense woods far from edges. In some areas, parasitism by cowbirds appears to be more common. Young: Fed by both parents. Leave the nest at 10 days of age. Probably 1 brood per year.
Fed by both parents. Leave the nest at 10 days of age. Probably 1 brood per year.
Mostly insects. Eats smooth caterpillars, but rarely or never takes the earthworms that the name would seem to imply. Also feeds on small grasshoppers, bugs, ants, bees, walkingsticks, beetles, sawfly larvae, and spiders. Feeds nestlings on moths and grubs.
Males defend territories by singing from perches at mid-levels or on the ground. Besides the usual insect-like trill, male also sings a musical, varied song during flight as part of courtship. Nest: Placed on ground, normally on hillside against a deciduous shrub or sapling, well concealed by dead leaves. Nest (constructed by female) is an open cup of dead leaf skeletons; lined with fungus filaments, hair moss, maple seed stems, animal hair.
Audubon’s scientists have used 140 million bird observations and sophisticated climate models to project how climate change will affect this bird’s range in the future.
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As event organizers are forced to make tough decisions over coronavirus concerns, local businesses and nonprofits brace for the fallout.
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