Staffan Bensch, Dennis Hasselquist, Torbjorn von Schantz, Genetic Similarity between Parents Predicts Hatching Failure: Nonincestuous Inbreeding in the Great Reed Warbler?, Evolution, Vol. 48, No. 2 (Apr., 1994), pp. 317-326
No takes yet. Share an insight, caveat, or question.
Bensch et al. (1994) studied this question.