Time, Energy, and Territoriality of the Anna Hummingbird (Calypte Anna)

Overview

Journal Science

Specialty Science

Date 1971 Aug 27

PMID 17812193

Citations 11

Authors

F G Stiles

Affiliations

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Abstract

The male Anna Hummingbird accommodates seasonal changes in energy demands by varying its allocation of time and energy among different activities; total energy expenditures change relatively little. Augmented terrritorial defense during the breeding season is made possible by increased feeding efficiency due to the availability at this time of very nectar-rich flowers.

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