Corpus ID: 9733721

Oxygen consumption during hover-feeding in free-ranging Anna hummingbirds.

@article{Bartholomew1986OxygenCD,
  title={Oxygen consumption during hover-feeding in free-ranging Anna hummingbirds.},
  author={G. Bartholomew and J. Lighton},
  journal={The Journal of experimental biology},
  year={1986},
  volume={123},
  pages={
          191-9
        }
}
Rates of oxygen consumption during hover-feeding of wild, unrestrained, adult male Anna hummingbirds (Calypte anna) were measured with an artificial outdoor feeder converted into a respirometer mask. A computer sampled changes in O2 concentration in air drawn through the mask, automatically detecting the presence of a hummingbird from a drop in the O2 concentration, and photoelectrically timing the duration over which the feeder functioned as a mask. Birds coming to the feeder were weighed on a… Expand
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