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Alternate care of two nests by a Red-tailed Comet (Sappho sparganurus)
- Sferco, Guillermo
- The Wilson journal of ornithology 2018 v.130 no.1 pp. 335-336
- chicks, females, hummingbirds, nests, temperate zones
- The first case of overlapping broods for the Red-tailed Comet (Sappho sparganurus) is documented. While feeding 2 chicks from a first brood, a female simultaneously began to build a second nest and successfully raised 2 young in each. The length of overlap of the 2 nests was estimated at 17 d. This is the first record of partial nest overlap for a hummingbird species in a temperate area in the Southern Hemisphere. In addition, these observations extend the altitudinal limit of this species 260 m below the previously lower boundary, which was for the nonbreeding season. Received 23 August. Accepted 6 March 2017.