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AMREAmerican Redstart (bird species)
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Three locally breeding species with sample sizes were large enough to estimate tree preferences for each year were American Redstart, Warbling Vireo, and Baltimore Oriole.
Neighboring American Redstarts tend to converge on a single first-category song for the breeding season (Lemon and others 1975).
Delayed plumage maturation and the presumed prealternate molt in American Redstarts. Wilson Bulletin 95:199-208.
In Jamaica, estimates of absolute abundances of American Redstarts (Setophaga ruticilla) differed more than threefold among four habitats studied, ranging from 17 to 56 individuals/10 ha [ILLUSTRATION FOR FIGURE 1 OMITTED].
But while there have been many changes, the coastal lowlands of eastern Long Island still provide a variety of habitats suitable for nesting American redstart, common yellow-throat, ovenbird, black-and-white, pine, prairie, blue-winged, chestnut-sided and yellow warblers.
Even after years of study, the American redstart and black-throated blue warbler still have secrets to tell.
To examine this, the Smithsonian scientists focused on American redstarts (Setophaga ruticilla), a member of the warbler family, at a non-breeding site in Jamaica where they conduct long-term studies.
Like bright jewels flitting about from tree limb to tree limb, yellow-rumped, black-throated blue, orange blackburnian warblers and American redstarts add their colors to the palette of the woods.
Others: American redstarts (eastern half of the country and upper Midwest), common yellowthroats (throughout the United States) and yellow-rumped warblers (throughout most of the country except in areas of the Midwest)
According to a recent study by Peter Marra of the Smithsonian Migratory Bird Center, American redstarts wintering in prime Jamaican mangrove habitat go on to have better reproductive success than those using less desirable scrublands.
4 Science, the researchers report that American redstarts that reach their New Hampshire summer breeding ground early--a big factor in nesting success--have isotope ratios typical of moist, food-rich winter habitats.
Each year in early May, American redstarts begin to stake out their breeding territories in the dense green forests of northern New Hampshire.
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