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1 December 2008 Postnatal Growth Rates of Hummingbirds: Review and New Records
Bernd P. Freymann, Karl-Ludwig Schuchmann
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Abstract

We review the published information on postnatal growth rates of hummingbirds (13 species), and report previously unpublished records for nine additional trochilid species. The allometric relationship based on the log10-transformed data of K (logistic growth rate constant) and body mass has a slope of −0.313 and an intercept of −0.346 (n = 22; r2 = 0.18; P = 0.049). The allometric relationship has a slope of −0.366 and an intercept of −0.327 (n = 20; r2 = 0.30; P = 0.013) if the two Nearctic records are excluded. Visual inspection suggests that higher K-values occur in Nearctic hummingbirds (x̄ = 0.422; n = 2) compared to Neotropic species (x̄ = 0.269; n = 20). We suggest a revival of studies collecting basic life history information such as postnatal growth rates of birds, especially of tropical taxa.

Bernd P. Freymann and Karl-Ludwig Schuchmann "Postnatal Growth Rates of Hummingbirds: Review and New Records," The Wilson Journal of Ornithology 120(4), 884-887, (1 December 2008). https://doi.org/10.1676/07-157.1
Received: 12 October 2007; Accepted: 1 February 2008; Published: 1 December 2008
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