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Screaming Cowbird - BirdForum Opus

Revision as of 15:48, 31 May 2023 by Jmorlan (talk | contribs) (→‎External Links: Combined English and scientific names.)
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Molothrus rufoaxillaris
Photo © by Fritz73


Adults are black with limited feather sheen, usually greenish-blue; female smaller (rufous axillars are usually not seen in the field). Younger birds mirror Grayish Baywing.

Similar species

Shiny Cowbird has a longer bill and rounder head. It is sexually dimorphic, so flocks of all black birds are more likely to be the present species.


Bolivia to Paraguay, Uruguay, Argentina, and Brazil.


This is a monotypic species.


Pastureland, towns, scrubby areas, and heavily degraded former forest.


It parasitizes the nest of the Grayish Baywing.


  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, B.L. Sullivan, C. L. Wood, and D. Roberson. 2012. The eBird/Clements Checklist of Birds of the World. 6th ed., with updates to October 2012. Ithaca: Cornell Univ. Press. ISBN 978-0801445019. Spreadsheet available at http://www.birds.cornell.edu/clementschecklist/downloadable-clements-checklist
  2. Neotropical birds online

Recommended Citation

External Links

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