B.-G. Carlsson, , , Bigyny in Tengmalm's Owl Aegolius funereus: Effect of Mating Strategy on Breeding Success, Ornis Scandinavica (Scandinavian Journal of Ornithology), Vol. 18, No. 4 (Nov., 1987), pp. 237-243
No takes yet. Share an insight, caveat, or question.
Carlsson et al. (1987) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: