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Dryad

Digital records of Brown-headed Cowbirds removing eggs and nestlings from nests of grassland passerine birds in southwest Wisconsin

Abstract

We present digital recordings from video surveillance systems at nests of grassland birds. Video surveillance systems were used as part of grassland bird studies done in southwestern Wisconsin. Study sites were clustered near Mt. Horeb (43.0167°N, 89.7500°W). Four grassy field types were studied: continuously-grazed pasture, prairie, and cool- and warm-season grass fields. The digital recordings archived here were used to document egg and nestling destruction by the Brown-headed Cowbird (Molothrus ater).