Buscar
Mostrando ítems 1-10 de 11
Áreas de acción de hembras y machos de Molothrus bonariensis y M. rufoaxillaris durante la búsqueda de nidos de hospedadoresRanging behavior of female and male Shiny Cowbirds and Screaming Cowbirds while searching for host nests
(American Ornithologists' Union, 2014-08)
Pusimos a prueba la hipótesis que los tordos parásitos de cría buscan y localizan nidos de hospedadores dentro de un área relativamente constante, ya que esto facilitaría el monitoreo de nidos a través del tiempo y la ...
Planning host exploitation through prospecting visits by parasitic cowbirds
(Springer, 2017-01)
Abstract: We studied visits to potential host nests by two avian brood parasites, the host generalist shiny cowbird, Molothrus bonariensis, and the host specialist screaming cowbird, Molothrus rufoaxillaris, in the periods ...
Sex differences in retention after a visual or a spatial discrimination learning task in brood parasitic shiny cowbirds
(Elsevier Science, 2015-10)
Females of avian brood parasites, like the shiny cowbird (Molothrus bonariensis), locate host nests and on subsequent days return to parasitize them. This ecological pressure for remembering the precise location of multiple ...
Effects of nest-site characteristics and parental activity on cowbird parasitism and nest predation in Brown-and-yellow MarshbirdsEfectos de las características del sitio de nidificación y actividad parental en el parasitismo de cría por tordos y predación de nidos en Pseudoleistes virescens
(Wiley Blackwell Publishing, Inc, 2009-03)
Nest-site selection and nest defense are strategies for reducing the costs of brood parasitism and nest predation, two selective forces that can influence avian nesting success and fitness. During 2001-2002, we analyzed ...
Shiny cowbirds share foster mothers but not true mothers in multiply parasitized mockingbird nests
(Springer, 2014-04)
Obligate brood parasitic birds, such as cowbirds, evade parental care duties by laying their eggs in the nests of other species. Cowbirds are assumed to avoid laying repeatedly in the same nest so as to prevent intrabrood ...
High Rates of Shiny Cowbird Parasitism on the Brown-and-yellow Marshbird Select for Complementary Host DefensesAltas Tasas de Parasitismo de Molothrus bonariensis sobre Pseudoleistes virescens Seleccionan Defensas Complementarias del Hospedador
(Cooper Ornithological Society, 2013-11)
Hosts of brood parasites may have not developed antiparasitic defenses either because host and parasite are recently sympatric or because costs of potential defenses outweigh their benefits. We studied antiparasitic defenses ...
Dense canopy cover over House Wren (Troglodytes aedon) nests increases latency of brood parasitism by Shiny Cowbirds (Molothrus bonariensis)
(Csiro Publishing, 2012-02)
Obligate brood parasites must find host nests in which to lay their eggs. The search for a suitable host nest is predicted to be more difficult if the host nest is well-concealed by vegetation (nest-concealment hypothesis) ...
Uso del espacio, búsqueda y monitoreo de nidos en dos especies parásitas de cría: el Tordo Renegrido (Molothrus bonariensis) y el Tordo Pico Corto (M. rufoaxillaris)Use of space, nest searching and nest monitoring in two brood parasites: the Shiny Cowbird (Molothrus bonariensis) and the Screaming Cowbird (M. rufoaxillaris)
(Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires, 2015)
Aspectos de la Biología Reproductiva del Zorzal Chiguanco (Turdus Chiguanco) en el Chaco Serrano de Córdoba, ArgentinaAspects of breeding biology of Chiguanco Thrush at Chaco Serrano of Córdoba, Argentina
(Neotropical Ornithological Society, 2013-08)
Some parameters of the breeding biology of the Chiguanco Thrush (Turdus chiguanco) are described in Chaco Serrano forest of Córdoba, Argentina. Searching and monitoring of the Chiguanco Thrush nests were performed between ...