Sociobiology of Bank Swallows: Reproductive Strategy of the Male

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Science  21 Sep 1979:
Vol. 205, Issue 4412, pp. 1282-1285
DOI: 10.1126/science.205.4412.1282


Male bank swallows pursue a mixed reproductive strategy. As previously documented, they form monogamous pair bonds with females with whom they will share parental duties of nest-building, incubation, and feeding of the young. In addition, however, they routinely seek promiscuous copulations with other females, both before and after pair-bonding.