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Manuel Soler - One of the best experts on this subject based on the ideXlab platform.
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Great spotted cuckoo Fledglings often receive feedings from other magpie adults than their foster parents: which magpies accept to feed foreign cuckoo Fledglings?
PloS one, 2014Co-Authors: Manuel Soler, Tomás Pérez-contreras, Juan Diego Ibáñez-Álamo, Gianluca Roncalli, Elena Macías-sánchez, Liesbeth De ,neveAbstract:Natural selection penalizes individuals that provide costly parental care to non-relatives. However, feedings to brood-parasitic Fledglings by individuals other than their foster parents, although anecdotic, have been commonly observed, also in the great spotted cuckoo (Clamator glandarius) – magpie (Pica pica) system, but this behaviour has never been studied in depth. In a first experiment, we here show that great spotted cuckoo Fledglings that were translocated to a distant territory managed to survive. This implies that obtaining food from foreign magpies is a frequent and efficient strategy used by great spotted cuckoo Fledglings. A second experiment, in which we presented a stuffed-cuckoo fledgling in magpie territories, showed that adult magpies caring for magpie Fledglings responded aggressively in most of the trials and never tried to feed the stuffed cuckoo, whereas magpies that were caring for cuckoo Fledglings reacted rarely with aggressive behavior and were sometimes disposed to feed the stuffed cuckoo. In a third experiment we observed feedings to post-fledgling cuckoos by marked adult magpies belonging to four different possibilities with respect to breeding status (i.e. composition of the brood: only cuckoos, only magpies, mixed, or failed breeding attempt). All non-parental feeding events to cuckoos were provided by magpies that were caring only for cuckoo Fledglings. These results strongly support the conclusion that cuckoo Fledglings that abandon their foster parents get fed by other adult magpies that are currently caring for other cuckoo Fledglings. These findings are crucial to understand the co-evolutionary arms race between brood parasites and their hosts because they show that the presence of the host's own nestlings for comparison is likely a key clue to favour the evolution of fledgling discrimination and provide new insights on several relevant points such as learning mechanisms and multiparasitism.
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Great spotted cuckoo Fledglings are disadvantaged by magpie host parents when reared together with magpie nestlings
Behavioral Ecology and Sociobiology, 2013Co-Authors: Manuel Soler, Liesbeth De ,neve, Juan Diego Ibáñez-Álamo, Gianluca Roncalli, Elena Macías-sánchez, Tomás Pérez-contrerasAbstract:The post-fledging period is a critical phase for juvenile survival, and parental care provided during this period is a key component of avian reproductive performance. Very little is known about the relationships between foster parents and Fledglings of brood parasites. Here, we present the results of a 5-year study about the relationships between Fledglings of the non-evictor brood parasitic great spotted cuckoo (Clamator glandarius) and its magpie (Pica pica) foster parents. Sometimes, great spotted cuckoo and magpie nestlings from the same nest can fledge successfully, but most often parasitic nestlings outcompete host nestlings and only cuckoos leave the nest. We have studied several aspects of cuckoo post-fledging performance (i.e. feeding behaviour, parental defence and fledgling survival) in experimental nests in which only cuckoos or both magpie and cuckoo nestlings survived until leaving the nest. The results indicate that great spotted cuckoo Fledglings reared in mixed broods together with magpie nestlings were disadvantaged by magpie adults with respect to feeding patterns. Fledgling cuckoos reared in mixed broods were fed less frequently than those reared in only cuckoo broods, and magpie adults approached less frequently to feed cuckoos from mixed broods than cuckoos from only cuckoo broods. These results imply that the presence of host's own nestlings for comparison may be a crucial clue favouring the evolution of fledgling discrimination; and furthermore, that the risk of discrimination at the fledgling stage probably is an important selection pressure driving the evolution of the arms race between brood parasites and their hosts.
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Communal Parental Care by Monogamous Magpie Hosts of Fledgling Great Spotted Cuckoos
The Condor, 1995Co-Authors: Manuel Soler, José Javier Palomino, Juan Gabriel Martínez, Juan José SolerAbstract:Fledglings of the brood-parasitic Great Spotted Cuckoo (Clamator glandarius) often formed groups with other fledgling cuckoos. Group size ranged from one to five Fledglings that originated from one to four different host nests. Each group of cuckoo Fledglings was attended by a group of Black-billed magpies (Pica pica). Frequently, a fledgling group was attended by more magpies than ones involved in nestling care. The feeding rate of fledgling cuckoos increased with the number of cuckoos per group and number of adult magpies attending the group. Flocking behavior presumably was advantageous for cuckoo Fledglings because each fledgling in larger groups received more food.
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Activity, Survival, Independence and Migration of Fledgling Great Spotted Cuckoos
The Condor, 1994Co-Authors: Manuel Soler, José Javier Palomino, Juan Gabriel Martínez, Juan José SolerAbstract:Parental care of Fledglings tends to last at least as long as that of nestlings, and in some cases twice as long (Skutch 1976). The post-fledging dependence period (hereafter called fledgling period) is critical for juvenile survival (Royama 1966, Sullivan 1989), and the probability of survival to independence appears to be an adequate estimate of relative probabilities of survival to breeding in many bird species (Magrath 1991). For avian brood parasites, very little is known about the behavior of foster parents in relation to their fledgling parasites (see review in Payne 1977 and Rothstein 1990). Only one detailed study exists (Woodward 1983), namely, on the fledging period of the Brown-headed Cowbird, Molothrus ater. Cowbirds are conspicuous after they leave the nest (Woodward 1983), in contrast to other fledgling parasites such as European Cuckoos, Cuculus canorus, which hide in the vegetation and remain immobile for long periods of time (Wyllie 1981). The Great Spotted Cuckoo Clamator glandarius is an obligate brood parasite which in Europe mainly parasitizes magpies Pica pica (Cramp 1985). We have shown that Great Spotted Cuckoo Fledglings often formed flocks (group size ranged from one to five), and that every group of cuckoo Fledglings was attended by a group of magpies (Soler et al., unpubl. manuscript). Cuckoo fledgling groups were frequently attended by more magpies than those involved in nestling rearing, and the feeding rate of fledgling cuckoos increased with the number of cuckoos per group and the number of adult magpies attending the group of fledgling cuckoos. We studied the behavior of fledgling Great Spotted Cuckoos. We paid special attention to the following aspects: (1) changes in the activity of fledgling cuckoos with age, (2) survival of fledgling cuckoos and magpies in parasitized nests, (3) post-fledgling dependence, and (4) migration of fledgling and adult cuckoos.
Liesbeth De ,neve - One of the best experts on this subject based on the ideXlab platform.
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Great spotted cuckoo Fledglings often receive feedings from other magpie adults than their foster parents: which magpies accept to feed foreign cuckoo Fledglings?
PloS one, 2014Co-Authors: Manuel Soler, Tomás Pérez-contreras, Juan Diego Ibáñez-Álamo, Gianluca Roncalli, Elena Macías-sánchez, Liesbeth De ,neveAbstract:Natural selection penalizes individuals that provide costly parental care to non-relatives. However, feedings to brood-parasitic Fledglings by individuals other than their foster parents, although anecdotic, have been commonly observed, also in the great spotted cuckoo (Clamator glandarius) – magpie (Pica pica) system, but this behaviour has never been studied in depth. In a first experiment, we here show that great spotted cuckoo Fledglings that were translocated to a distant territory managed to survive. This implies that obtaining food from foreign magpies is a frequent and efficient strategy used by great spotted cuckoo Fledglings. A second experiment, in which we presented a stuffed-cuckoo fledgling in magpie territories, showed that adult magpies caring for magpie Fledglings responded aggressively in most of the trials and never tried to feed the stuffed cuckoo, whereas magpies that were caring for cuckoo Fledglings reacted rarely with aggressive behavior and were sometimes disposed to feed the stuffed cuckoo. In a third experiment we observed feedings to post-fledgling cuckoos by marked adult magpies belonging to four different possibilities with respect to breeding status (i.e. composition of the brood: only cuckoos, only magpies, mixed, or failed breeding attempt). All non-parental feeding events to cuckoos were provided by magpies that were caring only for cuckoo Fledglings. These results strongly support the conclusion that cuckoo Fledglings that abandon their foster parents get fed by other adult magpies that are currently caring for other cuckoo Fledglings. These findings are crucial to understand the co-evolutionary arms race between brood parasites and their hosts because they show that the presence of the host's own nestlings for comparison is likely a key clue to favour the evolution of fledgling discrimination and provide new insights on several relevant points such as learning mechanisms and multiparasitism.
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Great Spotted Cuckoo Fledglings Often Receive Feedings from Other Magpie Adults than Their Foster Parents: Which Magpies Accept to Feed Foreign Cuckoo Fledglings?
'Public Library of Science (PLoS)', 2014Co-Authors: Soler Cruz Manuel, Pérez-contreras Tomás, Ibáñez-Álamo, Juan Diego, Roncalli Gianluca, Macías-sánchez Elena, Liesbeth De ,neveAbstract:Natural selection penalizes individuals that provide costly parental care to non-relatives. However, feedings to brood-parasitic Fledglings by individuals other than their foster parents, although anecdotic, have been commonly observed, also in the great spotted cuckoo (Clamator glandarius) – magpie (Pica pica) system, but this behaviour has never been studied in depth. In a first experiment, we here show that great spotted cuckoo Fledglings that were translocated to a distant territory managed to survive. This implies that obtaining food from foreign magpies is a frequent and efficient strategy used by great spotted cuckoo Fledglings. A second experiment, in which we presented a stuffed-cuckoo fledgling in magpie territories, showed that adult magpies caring for magpie Fledglings responded aggressively in most of the trials and never tried to feed the stuffed cuckoo, whereas magpies that were caring for cuckoo Fledglings reacted rarely with aggressive behavior and were sometimes disposed to feed the stuffed cuckoo. In a third experiment we observed feedings to post-fledgling cuckoos by marked adult magpies belonging to four different possibilities with respect to breeding status (i.e. composition of the brood: only cuckoos, only magpies, mixed, or failed breeding attempt). All non-parental feeding events to cuckoos were provided by magpies that were caring only for cuckoo Fledglings. These results strongly support the conclusion that cuckoo Fledglings that abandon their foster parents get fed by other adult magpies that are currently caring for other cuckoo Fledglings. These findings are crucial to understand the co-evolutionary arms race between brood parasites and their hosts because they show that the presence of the host's own nestlings for comparison is likely a key clue to favour the evolution of fledgling discrimination and provide new insights on several relevant points such as learning mechanisms and multiparasitism.This work was supported by the Spanish Ministerio de Economía y Competitividad/FEDER (research project CGL2011-25634/BOS)
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Great spotted cuckoo Fledglings are disadvantaged by magpie host parents when reared together with magpie nestlings
Behavioral Ecology and Sociobiology, 2013Co-Authors: Manuel Soler, Liesbeth De ,neve, Juan Diego Ibáñez-Álamo, Gianluca Roncalli, Elena Macías-sánchez, Tomás Pérez-contrerasAbstract:The post-fledging period is a critical phase for juvenile survival, and parental care provided during this period is a key component of avian reproductive performance. Very little is known about the relationships between foster parents and Fledglings of brood parasites. Here, we present the results of a 5-year study about the relationships between Fledglings of the non-evictor brood parasitic great spotted cuckoo (Clamator glandarius) and its magpie (Pica pica) foster parents. Sometimes, great spotted cuckoo and magpie nestlings from the same nest can fledge successfully, but most often parasitic nestlings outcompete host nestlings and only cuckoos leave the nest. We have studied several aspects of cuckoo post-fledging performance (i.e. feeding behaviour, parental defence and fledgling survival) in experimental nests in which only cuckoos or both magpie and cuckoo nestlings survived until leaving the nest. The results indicate that great spotted cuckoo Fledglings reared in mixed broods together with magpie nestlings were disadvantaged by magpie adults with respect to feeding patterns. Fledgling cuckoos reared in mixed broods were fed less frequently than those reared in only cuckoo broods, and magpie adults approached less frequently to feed cuckoos from mixed broods than cuckoos from only cuckoo broods. These results imply that the presence of host's own nestlings for comparison may be a crucial clue favouring the evolution of fledgling discrimination; and furthermore, that the risk of discrimination at the fledgling stage probably is an important selection pressure driving the evolution of the arms race between brood parasites and their hosts.
Tomás Pérez-contreras - One of the best experts on this subject based on the ideXlab platform.
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Great spotted cuckoo Fledglings often receive feedings from other magpie adults than their foster parents: which magpies accept to feed foreign cuckoo Fledglings?
PloS one, 2014Co-Authors: Manuel Soler, Tomás Pérez-contreras, Juan Diego Ibáñez-Álamo, Gianluca Roncalli, Elena Macías-sánchez, Liesbeth De ,neveAbstract:Natural selection penalizes individuals that provide costly parental care to non-relatives. However, feedings to brood-parasitic Fledglings by individuals other than their foster parents, although anecdotic, have been commonly observed, also in the great spotted cuckoo (Clamator glandarius) – magpie (Pica pica) system, but this behaviour has never been studied in depth. In a first experiment, we here show that great spotted cuckoo Fledglings that were translocated to a distant territory managed to survive. This implies that obtaining food from foreign magpies is a frequent and efficient strategy used by great spotted cuckoo Fledglings. A second experiment, in which we presented a stuffed-cuckoo fledgling in magpie territories, showed that adult magpies caring for magpie Fledglings responded aggressively in most of the trials and never tried to feed the stuffed cuckoo, whereas magpies that were caring for cuckoo Fledglings reacted rarely with aggressive behavior and were sometimes disposed to feed the stuffed cuckoo. In a third experiment we observed feedings to post-fledgling cuckoos by marked adult magpies belonging to four different possibilities with respect to breeding status (i.e. composition of the brood: only cuckoos, only magpies, mixed, or failed breeding attempt). All non-parental feeding events to cuckoos were provided by magpies that were caring only for cuckoo Fledglings. These results strongly support the conclusion that cuckoo Fledglings that abandon their foster parents get fed by other adult magpies that are currently caring for other cuckoo Fledglings. These findings are crucial to understand the co-evolutionary arms race between brood parasites and their hosts because they show that the presence of the host's own nestlings for comparison is likely a key clue to favour the evolution of fledgling discrimination and provide new insights on several relevant points such as learning mechanisms and multiparasitism.
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Great spotted cuckoo Fledglings are disadvantaged by magpie host parents when reared together with magpie nestlings
Behavioral Ecology and Sociobiology, 2013Co-Authors: Manuel Soler, Liesbeth De ,neve, Juan Diego Ibáñez-Álamo, Gianluca Roncalli, Elena Macías-sánchez, Tomás Pérez-contrerasAbstract:The post-fledging period is a critical phase for juvenile survival, and parental care provided during this period is a key component of avian reproductive performance. Very little is known about the relationships between foster parents and Fledglings of brood parasites. Here, we present the results of a 5-year study about the relationships between Fledglings of the non-evictor brood parasitic great spotted cuckoo (Clamator glandarius) and its magpie (Pica pica) foster parents. Sometimes, great spotted cuckoo and magpie nestlings from the same nest can fledge successfully, but most often parasitic nestlings outcompete host nestlings and only cuckoos leave the nest. We have studied several aspects of cuckoo post-fledging performance (i.e. feeding behaviour, parental defence and fledgling survival) in experimental nests in which only cuckoos or both magpie and cuckoo nestlings survived until leaving the nest. The results indicate that great spotted cuckoo Fledglings reared in mixed broods together with magpie nestlings were disadvantaged by magpie adults with respect to feeding patterns. Fledgling cuckoos reared in mixed broods were fed less frequently than those reared in only cuckoo broods, and magpie adults approached less frequently to feed cuckoos from mixed broods than cuckoos from only cuckoo broods. These results imply that the presence of host's own nestlings for comparison may be a crucial clue favouring the evolution of fledgling discrimination; and furthermore, that the risk of discrimination at the fledgling stage probably is an important selection pressure driving the evolution of the arms race between brood parasites and their hosts.
Catherine A. Lindell - One of the best experts on this subject based on the ideXlab platform.
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Survival, Habitat Use, and Movements of Fledgling White-Throated Robins (Turdus Assimilis) in a Costa Rican Agricultural Landscape
The Auk, 2004Co-Authors: Emily B. Cohen, Catherine A. LindellAbstract:Abstract We used radiotelemetry to study behavior of White-throated Robins (Turdus assimilis) during the postfledging dependent period. The study was conducted in a mixed agricultural and forested landscape in southern Costa Rica from March through August of 2001 and 2002. A transmitter was attached to one fledgling per brood (n = 53). Each bird was located daily prior to dispersal. We compared survivorship, habitat use, and movements of Fledglings from (1) nests in coffee plantations and (2) nests in cattle pastures. The probability of surviving the first three weeks out of the nest was 0.67 ± 0.07 (SE) for Fledglings from nests in all habitats, 0.58 ± 0.10 for Fledglings from nests in coffee, and 0.74 ± 0.26 for Fledglings from nests in pasture. Fledglings from nests in pasture left their nesting habitat at younger ages than did those from nests in coffee, and most birds from both habitats moved into forest when they left their nesting habitat. Pasture was rarely used during the postfledging period, whereas coffee plantations were used extensively. Fledglings that remained in agricultural habitats (coffee or pasture) were less likely to survive until dispersal than were those that moved into forested areas. Average daily distances from the nest gradually increased until Fledglings dispersed away from the natal area, always into forest, and were not different for birds from pasture or coffee. White-throated Robins can nest successfully in agricultural habitats, but use of forest positively influenced survivorship of young during the postfledging dependent period.
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SURVIVAL, HABITAT USE, AND MOVEMENTS OF FLEDGLING WHITE-THROATED ROBINS (TURDUS ASSIMILIS) IN A COSTA RICAN AGRICULTURAL LANDSCAPE
The Auk, 2004Co-Authors: Emily B. Cohen, Catherine A. LindellAbstract:Abstract We used radiotelemetry to study behavior of White-throated Robins (Turdus assimilis) during the postfledging dependent period. The study was conducted in a mixed agricultural and forested landscape in southern Costa Rica from March through August of 2001 and 2002. A transmitter was attached to one fledgling per brood (n = 53). Each bird was located daily prior to dispersal. We compared survivorship, habitat use, and movements of Fledglings from (1) nests in coffee plantations and (2) nests in cattle pastures. The probability of surviving the first three weeks out of the nest was 0.67 ± 0.07 (SE) for Fledglings from nests in all habitats, 0.58 ± 0.10 for Fledglings from nests in coffee, and 0.74 ± 0.26 for Fledglings from nests in pasture. Fledglings from nests in pasture left their nesting habitat at younger ages than did those from nests in coffee, and most birds from both habitats moved into forest when they left their nesting habitat. Pasture was rarely used during the postfledging period, whe...
Juan C Reboreda - One of the best experts on this subject based on the ideXlab platform.
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host parasite coevolution beyond the nestling stage mimicry of host Fledglings by the specialist screaming cowbird
Proceedings of The Royal Society B: Biological Sciences, 2012Co-Authors: María C. De Mársico, Mariela G Gantchoff, Juan C ReboredaAbstract:Egg mimicry by obligate avian brood parasites and host rejection of non-mimetic eggs are well-known textbook examples of host–parasite coevolution. By contrast, reciprocal adaptations and counteradaptations beyond the egg stage in brood parasites and their hosts have received less attention. The screaming cowbird (Molothrus rufoaxillaris) is a specialist obligate brood parasite whose Fledglings look identical to those of its primary host, the baywing (Agelaioides badius). Such a resemblance has been proposed as an adaptation in response to host discrimination against odd-looking young, but evidence supporting this idea is scarce. Here, we examined this hypothesis by comparing the survival rates of young screaming cowbirds and non-mimetic shiny cowbirds (Molothrus bonariensis) cross-fostered to baywing nests and quantifying the similarity in plumage colour and begging calls between host and cowbird Fledglings. Shiny cowbirds suffered higher post-fledging mortality rates (83%) than screaming cowbirds (0%) owing to host rejection. Visual modelling revealed that screaming cowbirds, but not shiny cowbirds, were indistinguishable from host young in plumage colour. Similarly, screaming cowbirds matched baywings' begging calls more closely than shiny cowbirds. Our results strongly support the occurrence of host fledgling mimicry in screaming cowbirds and suggest a role of visual and vocal cues in fledgling discrimination by baywings.
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Host–parasite coevolution beyond the nestling stage? Mimicry of host Fledglings by the specialist screaming cowbird
Proceedings. Biological sciences, 2012Co-Authors: María C. De Mársico, Mariela G Gantchoff, Juan C ReboredaAbstract:Egg mimicry by obligate avian brood parasites and host rejection of non-mimetic eggs are well-known textbook examples of host–parasite coevolution. By contrast, reciprocal adaptations and counteradaptations beyond the egg stage in brood parasites and their hosts have received less attention. The screaming cowbird (Molothrus rufoaxillaris) is a specialist obligate brood parasite whose Fledglings look identical to those of its primary host, the baywing (Agelaioides badius). Such a resemblance has been proposed as an adaptation in response to host discrimination against odd-looking young, but evidence supporting this idea is scarce. Here, we examined this hypothesis by comparing the survival rates of young screaming cowbirds and non-mimetic shiny cowbirds (Molothrus bonariensis) cross-fostered to baywing nests and quantifying the similarity in plumage colour and begging calls between host and cowbird Fledglings. Shiny cowbirds suffered higher post-fledging mortality rates (83%) than screaming cowbirds (0%) owing to host rejection. Visual modelling revealed that screaming cowbirds, but not shiny cowbirds, were indistinguishable from host young in plumage colour. Similarly, screaming cowbirds matched baywings' begging calls more closely than shiny cowbirds. Our results strongly support the occurrence of host fledgling mimicry in screaming cowbirds and suggest a role of visual and vocal cues in fledgling discrimination by baywings.