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    Author(s): Jared D. Wolfe; Peter Pyle; C. John Ralph
    Date: 2009
    Source: The Wilson Journal of Ornithology 121(3):556-567
    Publication Series: Scientific Journal (JRNL)
    PDF: Download Publication  (549.55 KB)


    Detailed accounts of molt and breeding cycles remain elusive for the majority of resident tropical bird species. We used data derived from a museum review and 12 years of banding data to infer breeding seasonality, molt patterns, and age and gender criteria for 27 common landbird species in northeastern Costa Rica. Prealternate molts appear to be rare, only occurring in one species (Sporophila corvina), while presupplemental molts were not detected. Most of our study species (70%) symmetrically replace flight feathers during the absence of migrant birds; molting during this period may limit resource competition during an energetically taxing phase of the avian life-cycle.

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    Wolfe, Jared D.; Pyle, Peter; Ralph, C. John. 2009. Breeding seasons, molt patterns, and gender and age criteria for selected northeastern Costa Rican resident landbirds. The Wilson Journal of Ornithology 121(3):556–567.


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