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Non-kin infanticide by a male in the polygamous Japanese Marsh Warbler (Locustella pryeri)
- Takahashi, Masao, Kamioki, Masayoshi, Ueda, Keisuke
- TheWilson journal of ornithology 2019 v.131 no.2 pp. 386-390
- Locustella pryeri, adults, birds, females, males, nesting, nestlings, nests, polygamy, rearing
- Non-kin infanticide is the killing of unrelated young by a conspecific adult, and occurs infrequently in some bird species. We observed a case of non-kin infanticide committed by a male Japanese Marsh Warbler (Locustella pryeri) in 2008. The sudden disappearance of a nesting male from his territory made the neighboring male expand his original territory to the vacant area where the unrelated nestlings were being reared by a female in the nest. The male found the nest and attacked the unrelated nestlings. We inferred that the infanticide sequence was done as food resource competition and/or sexually selected infanticide.