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The brown-headed cowbird (Molothrus ater) is a small, obligate brood parasitic icterid native to temperate and subtropical North America. It is a permanent resident in the southern parts of its range; northern birds migrate to the southern United States and Mexico in winter, returning to their summer habitat around March or April.
The brown thrasher is an omnivore, with its diet ranging from insects to fruits and nuts. The usual nesting areas are shrubs, small trees, or at times on ground level. Brown thrashers are generally inconspicuous but territorial birds, especially when defending their nests, and will attack species as large as humans. [4]
Brown-headed cowbird. Order: Passeriformes Family: Icteridae. The icterids are a group of small to medium-sized, often colorful passerine birds restricted to the New World and include the grackles, New World blackbirds, and New World orioles. Most species have black as a predominant plumage color, often enlivened by yellow, orange, or red.
The genus was introduced by English naturalist William Swainson in 1832 with the brown-headed cowbird (Molothrus ater) as the type species. [ 2 ] [ 3 ] The genus name combines the Ancient Greek mōlos , meaning "struggle" or "battle", with thrōskō , meaning "to sire" or "to impregnate". [ 4 ]
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The black-capped chickadee is the state bird of Massachusetts. This list of birds of Massachusetts includes species documented in the U.S. state of Massachusetts and accepted by the Massachusetts Avian Records Committee (MARC). As of July 2023, there are 516 species included in the official list. Of them, 194 are on the review list (see below), six have been introduced to North America, three ...
The brown-headed cowbird, a brood parasite, will lay its eggs in house finch nests, although the diet house finches feed their young is inadequate for the young cowbirds, which rarely survive. [ 26 ] In 2012, house finches positive for West Nile virus were found in northwestern Riverside County , CA.
Scarlet tanagers birds do best in the forest interior, where they are less exposed to predators and brood parasitism by the brown-headed cowbird. Being a bird that evolved to breed in forest interior and not exposed to the brown cowbird prior to habitat fragmentation, scarlet tanagers have not evolved any defensive strategies to cope with it ...