Could osmotaxis explain the ability of blue petrels to return to their burrows at night?

@article{Bonadonna2001CouldOE,
  title={Could osmotaxis explain the ability of blue petrels to return to their burrows at night?},
  author={Francesco Bonadonna and J Spaggiari and Henri Weimerskirch},
  journal={The Journal of experimental biology},
  year={2001},
  volume={204 Pt 8},
  pages={1485-9}
}
Like many other species of petrel, blue petrel (Halobaena caerulea) are able to return to their nest burrows at night in complete darkness. Since petrels have a well-developed olfactory system, we carried out an experiment to test whether blue petrels use olfaction to localise their nest burrows. Incubating birds were injected intranasally with a zinc sulphate solution, which reversibly impairs the sensitivity of the olfactory mucosa; control birds were treated with physiological saline… CONTINUE READING
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