Screaming cowbird parasitism of nests of solitary caciques and cattle tyrants

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 B...

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Autores principales: Mahler, Bettina, Reboreda, Juan Carlos
Publicado: 2010
Materias:
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
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15594491_v122_n4_p795_DiGiacomo
http://hdl.handle.net/20.500.12110/paper_15594491_v122_n4_p795_DiGiacomo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_15594491_v122_n4_p795_DiGiacomo
record_format dspace
spelling paper:paper_15594491_v122_n4_p795_DiGiacomo2023-06-08T16:23:47Z Screaming cowbird parasitism of nests of solitary caciques and cattle tyrants Mahler, Bettina Reboreda, Juan Carlos 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 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. Fil:Mahler, B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Reboreda, J.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15594491_v122_n4_p795_DiGiacomo http://hdl.handle.net/20.500.12110/paper_15594491_v122_n4_p795_DiGiacomo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic 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
spellingShingle 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
Mahler, Bettina
Reboreda, Juan Carlos
Screaming cowbird parasitism of nests of solitary caciques and cattle tyrants
topic_facet 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
description 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.
author Mahler, Bettina
Reboreda, Juan Carlos
author_facet Mahler, Bettina
Reboreda, Juan Carlos
author_sort Mahler, Bettina
title Screaming cowbird parasitism of nests of solitary caciques and cattle tyrants
title_short Screaming cowbird parasitism of nests of solitary caciques and cattle tyrants
title_full Screaming cowbird parasitism of nests of solitary caciques and cattle tyrants
title_fullStr Screaming cowbird parasitism of nests of solitary caciques and cattle tyrants
title_full_unstemmed Screaming cowbird parasitism of nests of solitary caciques and cattle tyrants
title_sort screaming cowbird parasitism of nests of solitary caciques and cattle tyrants
publishDate 2010
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15594491_v122_n4_p795_DiGiacomo
http://hdl.handle.net/20.500.12110/paper_15594491_v122_n4_p795_DiGiacomo
work_keys_str_mv AT mahlerbettina screamingcowbirdparasitismofnestsofsolitarycaciquesandcattletyrants
AT reboredajuancarlos screamingcowbirdparasitismofnestsofsolitarycaciquesandcattletyrants
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