Brown-headed Cowbird

Molothrus ater

Brown-headed Cowbird photographed by Mark Curtis
July 3, 2026
Brown-headed Cowbird photographed by Mark Curtis
July 3, 2026

When to look

Reported most in May, across 8M open records.

Records by month. January, 155,540 records. February, 216,228 records. March, 518,841 records. April, 1,800,605 records. May, 2,650,988 records. June, 1,295,451 records. July, 615,267 records. August, 223,314 records. September, 131,026 records. October, 168,742 records. November, 113,668 records. December, 115,155 records.

Occurrence data from GBIF (incl. the eBird Observation Dataset, © Cornell Lab of Ornithology, CC BY 4.0). Descriptive, not predictive.

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Every species with photos is in the field guide index.