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Query: vireoResult: 143rd of 152
Brown-headed Cowbird
Subject: Brown-headed Cowbird
Poster: funny (from@alt.binaries.images.fun)
birdcowbird1030204.jpg
Resolution: 691x463 File Size: 85763 Bytes Upload Date: 2006:03:06 23:28:00

Brown-headed Cowbird


Brown-headed Cowbirds are brood parasites. They do not build a nest,
but lay their eggs in other bird's nest, mostly warblers and vireos.
Ornithologists believe that this is an adaptation from the time when
cowbirds followed buffalo herds. They didn't stay in one place long
enough to build a nest and incubate eggs. We have many cowbirds here.

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Brown-headed Cowbird (Molothrus ater)
French: Vacher à tête brune German: Braunkopf-Kuhstärling Spanish: Tordo Cabecipardo
Other common names: Common Cowbird
Subspecies and Distribution
M. a. obscurus (J. F. Gmelin, 1789) – breeds along Pacific seaboard from S Alaska S (E to the Cascades and Sierra Nevada) to NW & N Mexico (N Baja California, also on mainland S to Oaxaca); N populations migrate to S parts of breeding range, in Mexico extending to S Baja Califonia.
M. a. artemisiae Grinnell, 1909 – breeds from W Canada (interior British Columbia E to SC Manitoba) S in W USA (E from the Cascades and Sierra Nevada) to California, Nevada and New Mexico; migrates S to Mexico (S to Michoacán).
M. a. ater (Boddaert, 1783) – breeds from SE Canada (S Ontario E to Newfoundland) S throughout E USA to C Texas, Gulf Coast and C Florida, and in E Mexico S to Tamaulipas; winters in Florida and in Mexico S to Oaxaca.
Also breeds in Yukon (NW Canada); race undetermined, possibly artemisiae.

vireo
143/152
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