Roosting behaviour is related to reproductive strategy in brood parasitic cowbirds
Shiny Cowbirds Molothrus bonariensis and Screaming Cowbirds Molothrus rufoaxillaris are closely related brood parasites but the former is socially polygynous or promiscuous and an extreme host generalist, whereas the latter is socially monogamous and parasitizes almost exclusively one host. Females...
Guardado en:
| Publicado: |
2018
|
|---|---|
| Materias: | |
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00191019_v160_n4_p779_Scardamaglia http://hdl.handle.net/20.500.12110/paper_00191019_v160_n4_p779_Scardamaglia |
| Aporte de: |
| id |
paper:paper_00191019_v160_n4_p779_Scardamaglia |
|---|---|
| record_format |
dspace |
| spelling |
paper:paper_00191019_v160_n4_p779_Scardamaglia2023-06-08T14:40:13Z Roosting behaviour is related to reproductive strategy in brood parasitic cowbirds bird assemblage Molothrus radio-tracking site fidelity space use annual variation brood parasitism parasitism passerine reproductive strategy roosting site fidelity space use tracking Aves Molothrus Molothrus bonariensis Molothrus rufoaxillaris Shiny Cowbirds Molothrus bonariensis and Screaming Cowbirds Molothrus rufoaxillaris are closely related brood parasites but the former is socially polygynous or promiscuous and an extreme host generalist, whereas the latter is socially monogamous and parasitizes almost exclusively one host. Females of both species lay in relative darkness, before dawn, relying for host nest location on previous days’ prospecting activity, or possibly on following better-informed roost associates. We studied the temporal and spatial patterns of roosting behaviour in these species to test the hypothesis that roosting behaviour of cowbirds is related to their breeding strategy (brood parasitism) and reflects differences in strategies between species. We recorded fidelity to a roost, location fidelity within a roost, inter-individual spatial associations and timing of roost departures and parasitic events, using tagged individuals. Female Shiny Cowbirds and both sexes of Screaming Cowbirds showed marked fidelity in roosting location, and roost departures occurred both during and after the known time window for parasitism, with earlier departures probably corresponding to laying days. Screaming Cowbird females and males that were trapped together and showed high levels of association during the day, also showed high levels of association in the roost. We describe the spatial and temporal patterns of a relatively poorly known aspect of avian ecology in general and the behaviour of brood parasites in particular. © 2018 British Ornithologists’ Union 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00191019_v160_n4_p779_Scardamaglia http://hdl.handle.net/20.500.12110/paper_00191019_v160_n4_p779_Scardamaglia |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
bird assemblage Molothrus radio-tracking site fidelity space use annual variation brood parasitism parasitism passerine reproductive strategy roosting site fidelity space use tracking Aves Molothrus Molothrus bonariensis Molothrus rufoaxillaris |
| spellingShingle |
bird assemblage Molothrus radio-tracking site fidelity space use annual variation brood parasitism parasitism passerine reproductive strategy roosting site fidelity space use tracking Aves Molothrus Molothrus bonariensis Molothrus rufoaxillaris Roosting behaviour is related to reproductive strategy in brood parasitic cowbirds |
| topic_facet |
bird assemblage Molothrus radio-tracking site fidelity space use annual variation brood parasitism parasitism passerine reproductive strategy roosting site fidelity space use tracking Aves Molothrus Molothrus bonariensis Molothrus rufoaxillaris |
| description |
Shiny Cowbirds Molothrus bonariensis and Screaming Cowbirds Molothrus rufoaxillaris are closely related brood parasites but the former is socially polygynous or promiscuous and an extreme host generalist, whereas the latter is socially monogamous and parasitizes almost exclusively one host. Females of both species lay in relative darkness, before dawn, relying for host nest location on previous days’ prospecting activity, or possibly on following better-informed roost associates. We studied the temporal and spatial patterns of roosting behaviour in these species to test the hypothesis that roosting behaviour of cowbirds is related to their breeding strategy (brood parasitism) and reflects differences in strategies between species. We recorded fidelity to a roost, location fidelity within a roost, inter-individual spatial associations and timing of roost departures and parasitic events, using tagged individuals. Female Shiny Cowbirds and both sexes of Screaming Cowbirds showed marked fidelity in roosting location, and roost departures occurred both during and after the known time window for parasitism, with earlier departures probably corresponding to laying days. Screaming Cowbird females and males that were trapped together and showed high levels of association during the day, also showed high levels of association in the roost. We describe the spatial and temporal patterns of a relatively poorly known aspect of avian ecology in general and the behaviour of brood parasites in particular. © 2018 British Ornithologists’ Union |
| title |
Roosting behaviour is related to reproductive strategy in brood parasitic cowbirds |
| title_short |
Roosting behaviour is related to reproductive strategy in brood parasitic cowbirds |
| title_full |
Roosting behaviour is related to reproductive strategy in brood parasitic cowbirds |
| title_fullStr |
Roosting behaviour is related to reproductive strategy in brood parasitic cowbirds |
| title_full_unstemmed |
Roosting behaviour is related to reproductive strategy in brood parasitic cowbirds |
| title_sort |
roosting behaviour is related to reproductive strategy in brood parasitic cowbirds |
| publishDate |
2018 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00191019_v160_n4_p779_Scardamaglia http://hdl.handle.net/20.500.12110/paper_00191019_v160_n4_p779_Scardamaglia |
| _version_ |
1768542628969709568 |