Nota sobre casos de parasitismo del Renegrido (Molothrus bonariensis) sobre varios Passeriformes observados en la provincia de Corrientes

Autores
Wilson, David B.
Año de publicación
1979
Idioma
español castellano
Tipo de recurso
artículo
Estado
versión publicada
Descripción
These observations were made in Estancia Curupicay, a cattle ranch, some 12 miles from Mercedes, and situated nearly in the centre of the province of Corrientes. The ranch consists of open pasture land, with few native trees except along the streams. It has many exotics such as casuarinas, Eucalyptus and paraísos planted round the administration buildings and in scattered groups to give shade to the cattle. The Shiny Cowbird (Molothrus bonariensis), is abundant in all the district. The Crowned Slaty-Flycatcher (Empidonomus aurantio-atro-cristatus ), was recorded once feeding a fledgling Shiny Cowbird (7 January 1975). The Hornero (Fumarius rufus ), is also here in numbers, nine nests being the aproximate number built in the gardens of the ranch each year. Horneros have been observed feeding young Cowbirds since 1973, in November of each year. Three pairs were seen with young parasites each spring, with two or with one, but never with any of their own brood and the young Cowbird at the same time. Great Kiskadees ( Pitangus sulphuratus ), have also been seen feeding young Cowbirds, so it would seems that covered neasts are no protection against brood-parasites. I have actually seen a female Cowbird go into an Horneros nest on two oceasions, and found a fallen Horneros nest with broken eggs of the owners and one Cowbird´s egg that was mottled and typical. The Rufos-collared Sparrow ( Zonotrichia capensis ), in common in the gardens, and nest in the privet hedges, but I have never seen them followed by young Cowbirds. The Bay winged Cowbirds come to my bird table, in company with young Screaming Cowbirds, but I have never seen a young Shiny Cowbird in their small flocks. So it would seen that brood-parasitism by the Shiny Cowbird on the Hornero is relatively common in the province of Corrientes, also on the Great Kiskadee, and that birds victimized vary according the zone. The species being different in the province of Buenos Aires to the ones that are preferred here.
Fuente
Hornero (en línea) 1979;01(012):069-071
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc/2.5/ar
Repositorio
Biblioteca Digital (UBA-FCEN)
Institución
Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
OAI Identificador
hornero:hornero_v012_n01_p069

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spelling Nota sobre casos de parasitismo del Renegrido (Molothrus bonariensis) sobre varios Passeriformes observados en la provincia de CorrientesWilson, David B.These observations were made in Estancia Curupicay, a cattle ranch, some 12 miles from Mercedes, and situated nearly in the centre of the province of Corrientes. The ranch consists of open pasture land, with few native trees except along the streams. It has many exotics such as casuarinas, Eucalyptus and paraísos planted round the administration buildings and in scattered groups to give shade to the cattle. The Shiny Cowbird (Molothrus bonariensis), is abundant in all the district. The Crowned Slaty-Flycatcher (Empidonomus aurantio-atro-cristatus ), was recorded once feeding a fledgling Shiny Cowbird (7 January 1975). The Hornero (Fumarius rufus ), is also here in numbers, nine nests being the aproximate number built in the gardens of the ranch each year. Horneros have been observed feeding young Cowbirds since 1973, in November of each year. Three pairs were seen with young parasites each spring, with two or with one, but never with any of their own brood and the young Cowbird at the same time. Great Kiskadees ( Pitangus sulphuratus ), have also been seen feeding young Cowbirds, so it would seems that covered neasts are no protection against brood-parasites. I have actually seen a female Cowbird go into an Horneros nest on two oceasions, and found a fallen Horneros nest with broken eggs of the owners and one Cowbird´s egg that was mottled and typical. The Rufos-collared Sparrow ( Zonotrichia capensis ), in common in the gardens, and nest in the privet hedges, but I have never seen them followed by young Cowbirds. The Bay winged Cowbirds come to my bird table, in company with young Screaming Cowbirds, but I have never seen a young Shiny Cowbird in their small flocks. So it would seen that brood-parasitism by the Shiny Cowbird on the Hornero is relatively common in the province of Corrientes, also on the Great Kiskadee, and that birds victimized vary according the zone. The species being different in the province of Buenos Aires to the ones that are preferred here.Aves Argentinas. Asociación Ornitológica del Plata1979-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttps://hdl.handle.net/20.500.12110/hornero_v012_n01_p069Hornero (en línea) 1979;01(012):069-071reponame:Biblioteca Digital (UBA-FCEN)instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesinstacron:UBA-FCENspainfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc/2.5/ar2025-09-29T13:43:26Zhornero:hornero_v012_n01_p069Institucionalhttps://digital.bl.fcen.uba.ar/Universidad públicaNo correspondehttps://digital.bl.fcen.uba.ar/cgi-bin/oaiserver.cgiana@bl.fcen.uba.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:18962025-09-29 13:43:27.471Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse
dc.title.none.fl_str_mv Nota sobre casos de parasitismo del Renegrido (Molothrus bonariensis) sobre varios Passeriformes observados en la provincia de Corrientes
title Nota sobre casos de parasitismo del Renegrido (Molothrus bonariensis) sobre varios Passeriformes observados en la provincia de Corrientes
spellingShingle Nota sobre casos de parasitismo del Renegrido (Molothrus bonariensis) sobre varios Passeriformes observados en la provincia de Corrientes
Wilson, David B.
title_short Nota sobre casos de parasitismo del Renegrido (Molothrus bonariensis) sobre varios Passeriformes observados en la provincia de Corrientes
title_full Nota sobre casos de parasitismo del Renegrido (Molothrus bonariensis) sobre varios Passeriformes observados en la provincia de Corrientes
title_fullStr Nota sobre casos de parasitismo del Renegrido (Molothrus bonariensis) sobre varios Passeriformes observados en la provincia de Corrientes
title_full_unstemmed Nota sobre casos de parasitismo del Renegrido (Molothrus bonariensis) sobre varios Passeriformes observados en la provincia de Corrientes
title_sort Nota sobre casos de parasitismo del Renegrido (Molothrus bonariensis) sobre varios Passeriformes observados en la provincia de Corrientes
dc.creator.none.fl_str_mv Wilson, David B.
author Wilson, David B.
author_facet Wilson, David B.
author_role author
dc.description.none.fl_txt_mv These observations were made in Estancia Curupicay, a cattle ranch, some 12 miles from Mercedes, and situated nearly in the centre of the province of Corrientes. The ranch consists of open pasture land, with few native trees except along the streams. It has many exotics such as casuarinas, Eucalyptus and paraísos planted round the administration buildings and in scattered groups to give shade to the cattle. The Shiny Cowbird (Molothrus bonariensis), is abundant in all the district. The Crowned Slaty-Flycatcher (Empidonomus aurantio-atro-cristatus ), was recorded once feeding a fledgling Shiny Cowbird (7 January 1975). The Hornero (Fumarius rufus ), is also here in numbers, nine nests being the aproximate number built in the gardens of the ranch each year. Horneros have been observed feeding young Cowbirds since 1973, in November of each year. Three pairs were seen with young parasites each spring, with two or with one, but never with any of their own brood and the young Cowbird at the same time. Great Kiskadees ( Pitangus sulphuratus ), have also been seen feeding young Cowbirds, so it would seems that covered neasts are no protection against brood-parasites. I have actually seen a female Cowbird go into an Horneros nest on two oceasions, and found a fallen Horneros nest with broken eggs of the owners and one Cowbird´s egg that was mottled and typical. The Rufos-collared Sparrow ( Zonotrichia capensis ), in common in the gardens, and nest in the privet hedges, but I have never seen them followed by young Cowbirds. The Bay winged Cowbirds come to my bird table, in company with young Screaming Cowbirds, but I have never seen a young Shiny Cowbird in their small flocks. So it would seen that brood-parasitism by the Shiny Cowbird on the Hornero is relatively common in the province of Corrientes, also on the Great Kiskadee, and that birds victimized vary according the zone. The species being different in the province of Buenos Aires to the ones that are preferred here.
description These observations were made in Estancia Curupicay, a cattle ranch, some 12 miles from Mercedes, and situated nearly in the centre of the province of Corrientes. The ranch consists of open pasture land, with few native trees except along the streams. It has many exotics such as casuarinas, Eucalyptus and paraísos planted round the administration buildings and in scattered groups to give shade to the cattle. The Shiny Cowbird (Molothrus bonariensis), is abundant in all the district. The Crowned Slaty-Flycatcher (Empidonomus aurantio-atro-cristatus ), was recorded once feeding a fledgling Shiny Cowbird (7 January 1975). The Hornero (Fumarius rufus ), is also here in numbers, nine nests being the aproximate number built in the gardens of the ranch each year. Horneros have been observed feeding young Cowbirds since 1973, in November of each year. Three pairs were seen with young parasites each spring, with two or with one, but never with any of their own brood and the young Cowbird at the same time. Great Kiskadees ( Pitangus sulphuratus ), have also been seen feeding young Cowbirds, so it would seems that covered neasts are no protection against brood-parasites. I have actually seen a female Cowbird go into an Horneros nest on two oceasions, and found a fallen Horneros nest with broken eggs of the owners and one Cowbird´s egg that was mottled and typical. The Rufos-collared Sparrow ( Zonotrichia capensis ), in common in the gardens, and nest in the privet hedges, but I have never seen them followed by young Cowbirds. The Bay winged Cowbirds come to my bird table, in company with young Screaming Cowbirds, but I have never seen a young Shiny Cowbird in their small flocks. So it would seen that brood-parasitism by the Shiny Cowbird on the Hornero is relatively common in the province of Corrientes, also on the Great Kiskadee, and that birds victimized vary according the zone. The species being different in the province of Buenos Aires to the ones that are preferred here.
publishDate 1979
dc.date.none.fl_str_mv 1979-07
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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info:ar-repo/semantics/articulo
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status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.12110/hornero_v012_n01_p069
url https://hdl.handle.net/20.500.12110/hornero_v012_n01_p069
dc.language.none.fl_str_mv spa
language spa
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc/2.5/ar
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc/2.5/ar
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Aves Argentinas. Asociación Ornitológica del Plata
publisher.none.fl_str_mv Aves Argentinas. Asociación Ornitológica del Plata
dc.source.none.fl_str_mv Hornero (en línea) 1979;01(012):069-071
reponame:Biblioteca Digital (UBA-FCEN)
instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron:UBA-FCEN
reponame_str Biblioteca Digital (UBA-FCEN)
collection Biblioteca Digital (UBA-FCEN)
instname_str Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron_str UBA-FCEN
institution UBA-FCEN
repository.name.fl_str_mv Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
repository.mail.fl_str_mv ana@bl.fcen.uba.ar
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