Why do territorial male Tengmalm's owls fail to obtain a mate?

@article{Hakkarainen1998WhyDT,
  title={Why do territorial male Tengmalm's owls fail to obtain a mate?},
  author={Harri Hakkarainen and Erkki Korpim{\"a}ki},
  journal={Oecologia},
  year={1998},
  volume={114},
  pages={578-582}
}
Non-breeding may occur because non-breeders are immature or somehow physiologically incapable of breeding, or because of a lack of resources (e.g. food resources, mating partners) needed to breed. There is, however, a lack of experimental evidence on whether bachelor males possessing territories and nest-sites are able to breed when supplemented with extra food or provided with mating partners. In vole-eating Tengmalm's owl, Aegolius funereus, we provided supplementary food and transferred… CONTINUE READING

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