Do female great tits (Parus major) assess males by eavesdropping? A field study using interactive song playback
K. Otter, P. K. McGregor, A. M. R. Terry, F. R. L. Burford, T. M. Peake, and T. Dabelsteen
Proc Biol Sci. 1999 July 7; 266(1426): 1305. doi: 10.1098/rspb.1999.0779.PMCID: PMC1690081