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1 March 2018 Alternate care of two nests by a Red-tailed Comet (Sappho sparganurus)
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Abstract

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.

Guillermo Sferco "Alternate care of two nests by a Red-tailed Comet (Sappho sparganurus)," The Wilson Journal of Ornithology 130(1), 335-336, (1 March 2018). https://doi.org/10.1676/16-137.1
Published: 1 March 2018
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