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Abstract:

The Screaming Cowbird (Molothrus rufoaxillaris) is one of the most specialized brood parasites with only three known hosts: Baywing (Agelaioides badius), the main host throughout most of its range, and two alternative hosts in some areas of its distribution, Chopi Blackbird (Gnorimopsar chopi) and Brown-and-yellow Marshbird (Pseudoleistes virescens). We studied Screaming Cowbird parasitism in northeast Argentina where this parasite uses Baywings and Chopi Blackbirds as hosts. We monitored 69 nests of Baywings, 251 of Chopi Blackbirds, 31 of Solitary Caciques (Cacicus solitarius), and 30 of Cattle Tyrants (Machetornis rixosa). The frequency of Screaming Cowbird parasitism on Baywing nests was 80 and was 46 for Chopi Blackbirds. We recorded one event of Screaming Cowbird parasitism on one nest of Solitary Caciques and three events of Screaming Cowbird parasitism on one nest of Cattle Tyrants. The identities of parasitic eggs in both hosts were confirmed by sequencing the mtDNA control region. We propose these events of parasitism resulted from recognition errors by Screaming Cowbird females that regularly parasitize Baywings and Chopi Blackbirds. The nest of Solitary Caciques had been frequently visited by a pair of Baywings before Screaming Cowbird parasitism occurred, and the nest of Cattle Tyrants was near an active Chopi Blackbird nest that had been previously parasitized by Screaming Cowbirds. © 2010 by the Wilson Ornithological Society.

Registro:

Documento: Artículo
Título:Screaming cowbird parasitism of nests of solitary caciques and cattle tyrants
Autor:Di Giacomo, A.G.; Mahler, B.; Reboreda, J.C.
Filiación:Departamento de Conservación, Aves Argentinas-Asociación Ornitolgica Del Plata, Matheu 1246, C1249AAB Buenos Aires, Argentina
Departamento de Ecología, Gentica y Evolución, Facultad de Ciencias Exactas y Naturales, Pabellón II Ciudad Universitaria, C1428EGA Buenos Aires, Argentina
Palabras clave:brood parasitism; error analysis; frequency analysis; home range; host-parasite interaction; mitochondrial DNA; nest; parasitism; passerine; species diversity; Argentina; Bos; Cacicus solitarius; Gnorimopsar chopi; Machetornis; Molothrus; Molothrus rufoaxillaris; Pseudoleistes virescens; Turdus merula
Año:2010
Volumen:122
Número:4
Página de inicio:795
Página de fin:799
DOI: http://dx.doi.org/10.1676/10-002.1
Título revista:Wilson Journal of Ornithology
Título revista abreviado:Wilson J. Ornithol.
ISSN:15594491
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15594491_v122_n4_p795_DiGiacomo

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Citas:

---------- APA ----------
Di Giacomo, A.G., Mahler, B. & Reboreda, J.C. (2010) . Screaming cowbird parasitism of nests of solitary caciques and cattle tyrants. Wilson Journal of Ornithology, 122(4), 795-799.
http://dx.doi.org/10.1676/10-002.1
---------- CHICAGO ----------
Di Giacomo, A.G., Mahler, B., Reboreda, J.C. "Screaming cowbird parasitism of nests of solitary caciques and cattle tyrants" . Wilson Journal of Ornithology 122, no. 4 (2010) : 795-799.
http://dx.doi.org/10.1676/10-002.1
---------- MLA ----------
Di Giacomo, A.G., Mahler, B., Reboreda, J.C. "Screaming cowbird parasitism of nests of solitary caciques and cattle tyrants" . Wilson Journal of Ornithology, vol. 122, no. 4, 2010, pp. 795-799.
http://dx.doi.org/10.1676/10-002.1
---------- VANCOUVER ----------
Di Giacomo, A.G., Mahler, B., Reboreda, J.C. Screaming cowbird parasitism of nests of solitary caciques and cattle tyrants. Wilson J. Ornithol. 2010;122(4):795-799.
http://dx.doi.org/10.1676/10-002.1