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1 June 2004 FIRST REPORT OF COWBIRD PARASITISM ON THE BLACK-CAPPED GNATCATCHER IN WESTERN MEXICO
Jorge H. Vega Rivera, Fernando Alvarado, Taĺia Valdivia, John Rappole
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Abstract

Information on cowbird parasitism in Mexico is rare. We report the successful fledging of a brown-headed cowbird (Molothrus ater) nestling by black-capped gnatcatchers (Polioptila nigriceps) in the tropical deciduous forest of the Chamela-Cuixmala Biosphere Reserve, western Mexico, in June 2001. We observed 2 additional gnatcatcher pairs feeding a single brown-headed cowbird fledging. Opportunistic observations of nests of other species and few captures of brown-headed cowbirds during 18 months of intensive mistnetting suggested that cowbird abundance and parasitism was low in the reserve.

Jorge H. Vega Rivera, Fernando Alvarado, Taĺia Valdivia, and John Rappole "FIRST REPORT OF COWBIRD PARASITISM ON THE BLACK-CAPPED GNATCATCHER IN WESTERN MEXICO," The Southwestern Naturalist 49(2), 277-278, (1 June 2004). https://doi.org/10.1894/0038-4909(2004)049<0277:FROCPO>2.0.CO;2
Accepted: 16 June 2003; Published: 1 June 2004
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