Richard Klim
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Baladrón, Cavalli, Isacch, Bó & Madrid 2015. Body size and sexual dimorphism in the southernmost subspecies of the Burrowing Owl (Athene cunicularia cunicularia). J Raptor Res 49(4): 479–485. [abstract]
Holt et al 2014 (HBW Alive).
Holt et al 2014 (HBW Alive).