The Breeding Biology of the Brown Jay in Monteverde, Costa Rica

In an expanding population of Brown Jays (Cyanocorax morio) in the Cordillera de Tilaran of Costa Rica, flocks exhibit a broad range of breeding behavior involving the construction of one or more nests by two or more birds, egg-laying, incubation and brooding at one nest by one or more females, and...

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Bibliographic Details
Published in:The Condor (Los Angeles, Calif.) Calif.), 1985-05, Vol.87 (2), p.192-204
Main Authors: Lawton, Marcy F., Lawton, Robert O.
Format: Article
Language:English
Subjects:
Age structure
Animal ethology
Aves
Aviculture
Biological and medical sciences
Bird nesting
Birds
Breeding
Breeding seasons
Cyanocorax morio
Eggs
Female animals
Flocks
Fundamental and applied biological sciences. Psychology
Mating behavior
Psychology. Psychoanalysis. Psychiatry
Vertebrata
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Summary:In an expanding population of Brown Jays (Cyanocorax morio) in the Cordillera de Tilaran of Costa Rica, flocks exhibit a broad range of breeding behavior involving the construction of one or more nests by two or more birds, egg-laying, incubation and brooding at one nest by one or more females, and nestling care by breeding and non-breeding birds. The form that breeding behavior takes may be related to the ages of flock members. Flocks vary considerably in age, and breeding success is correlated with the number of older birds. The variation in Brown Jay breeding behavior may provide some insight into the evolution of social organization in New World corvids.
ISSN:0010-5422
1938-5129
DOI:10.2307/1366883