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The loss of feeding and breeding habitat and brood parasitism by the shiny cowbird are among other threats that limit and endanger the yellow-shouldered blackbird populations. Natural predators, such as the pearly-eyed thrasher ( Margarops fuscatus ), also represent a threat, although minor, to the populations.
Some cowbird species engage in brood parasitism; females lay their eggs in the nests of other species, in a similar fashion to some cuckoos. [ 3 ] Some species of icterid have become agricultural pests ; for example, red-winged blackbirds in the United States are considered the worst vertebrate pests on some crops, such as rice . [ 6 ]
Red-shouldered blackbird: Cuba Agelaius tricolor: Tricolored blackbird: Pacific coast of North America, from Northern California in the U.S. (with occasional strays into Oregon), to upper Baja California in Mexico. Agelaius humeralis: Tawny-shouldered blackbird: Cuba, Hispaniola, and the Cayman Islands Agelaius xanthomus: Yellow-shouldered ...
Red-shouldered blackbird: Agelaius assimilis Lembeye, 1850: 70 Screaming cowbird: Molothrus rufoaxillaris Cassin, 1866: 71 Giant cowbird: Molothrus oryzivorus (Gmelin, JF, 1788) 72 Shiny cowbird: Molothrus bonariensis (Gmelin, JF, 1789) 73 Bronzed cowbird: Molothrus aeneus (Wagler, 1829) 74 Bronze-brown cowbird: Molothrus armenti Cabanis, 1851: ...
Yellow-headed blackbird. 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.
Yellow-shouldered blackbird, an endemic blackbird placed in the United States Fish and Wildlife Service list of endangered species in 1976. 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 ...
The female cowbird may continue to observe this nest after laying eggs. Some bird species have evolved the ability to detect such parasitic eggs, and may reject them by pushing them out of their nests, but the female cowbird has been observed to attack and destroy the remaining eggs of such birds as a consequence, dissuading further removals. [8]
Yellow-shouldered blackbird: Agelaius xanthomus (A) Shiny cowbird: Molothrus bonariensis: Brown-headed cowbird: Molothrus ater (A) Greater Antillean grackle ...