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1 June 2000 PARENTAL CARE OF FLEDGLING WOOD THRUSHES
J. H. Vega Rivera, C. A. Haas, J. H. Rappole, W. J. McShea
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Abstract

We report the study of parental care of Wood Thrush (Hylocichla mustelina) fledglings from nest-leaving to independence. From 1993 to 1995, we captured, radio-tagged, and monitored the movements and behavior of 23 fledglings and their parents from 12 broods at the U.S. Marine Corps Base, Quantico, Virginia. For pairs that subsequently renested (n = 5), the family group of male, female, and fledglings, remained within 62 (±5 SE) m of the first nest after fledging. During the period of post-fledging parental care, mean maximum distance between parents was 70 (±14) m. Females attended the young 13 (±1.3) days before initiating the incubation of a second clutch. Males continued attending the fledglings for 6 (±0.7) more days until the young achieved independence and dispersed (28–36 days post-hatching). In final clutches (n = 7), brood care was divided between the parents, and the position of the fledglings relative to the nest depended on the parents' choice of molting site (in the nesting area or elsewhere). Division of the brood by the parents has been thought to be a strategy to reduce predation and increase foraging efficiency. However, in the Wood Thrush and other species, joint attendance of initial broods, but division of final broods, suggest that other factors could be important for the parents' decision of whether or not to split the brood.

J. H. Vega Rivera, C. A. Haas, J. H. Rappole, and W. J. McShea "PARENTAL CARE OF FLEDGLING WOOD THRUSHES," The Wilson Bulletin 112(2), 233-237, (1 June 2000). https://doi.org/10.1676/0043-5643(2000)112[0233:PCOFWT]2.0.CO;2
Received: 15 June 1999; Accepted: 1 November 1999; Published: 1 June 2000
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