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DISCUSSION Negative relationships between the distance to the nearest source of manure and both the weight and proportion of manure, suggests that owls use manure in proportion to it’s convenience and availability in the landscape.
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SELECTIVE USE OF NEST LINING MATERIALS BY BURROWING OWLS
Matthew Denman Smith and Courtney J. Conway
Arizona Cooperative Fish and Wildlife Research Unit, The University of Arizona, Tucson, AZ
Figs 4&5. Owls preferred manure and grass divots and avoided carpet and tin foil as nest-lining material in our supply-station selection trials. We detected no difference between the amount of manure and grass divots selected.
Thanks to our field workers: C. Forristal, D. Hearne, M. Hearne, T. McLaughlin, S. Millus, P. Ramey, C. Sanders, and A. Sanfacon. Special thanks to Sandpiper Technologies and the American Museum of Natural History’s Frank Chapman Memorial Research Fund.
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Figs 1&2. Proportion of manure in nest-lining material decreases as the distance from a source of manure increases.
Fig 3. Grass and manure are the most common nest- lining materials used.