Hummingbird feeding mechanics: comments on the capillarity model.


Kim et al. (1), in their recent paper about optimal nectar concentrations based on liquid extraction mechanisms, reported experiments with hummingbirds that we believe are misleading. In a footnote, they cited our recent study (2) on hummingbird feeding mechanics; however, in contrast to our work, they conclude that capillarity is an important mechanism of… (More)
DOI: 10.1073/pnas.1119750109


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