Is hypothermia necessary for the winter survival of the GoldcrestRegulus regulus?

@article{Reinertsen2005IsHN,
  title={Is hypothermia necessary for the winter survival of the GoldcrestRegulus regulus?},
  author={R. Reinertsen and S. Haftorn and E. Thaler},
  journal={Journal f{\"u}r Ornithologie},
  year={2005},
  volume={129},
  pages={433-437}
}
The Goldcrest is an interesting species for studies of physiological and behavioural adaptions to cold, since it is the smallest species present in Europe. Although many small birds have to lower their metabolic rate and enter hypothermia in order to make their energy reserves last throughout the night, our measurements of oxygen consumption of five Goldcrests suggest that these birds may be able to balance their nocturnal energy budget during the winter at normothermic body temperatures… Expand
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