Journal of the Yamashina Institute for Ornithology
Online ISSN : 1882-0999
Print ISSN : 1348-5032
ISSN-L : 1348-5032
Short Notes
Sexual Behaviors toward Substitute Objectsby the Black-winged Stilt Himantopus himantopus himantopus, Especially by Young Individuals
Tamaki Kitagawa
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2022 Volume 54 Issue 1 Pages 193-200


Forty-four cases of sexual behaviors toward substitute objects (SBTSOs) were observed at four breeding sites and five wintering sites of the Black-winged Stilt Himantopus himantopus himantopus. Although the actions were observed throughout the year, most were observed in the early breeding season. They were performed on clods, reed stems, plastic bags, a wooden stick, a beverage can, and a tennis ball. In total, one adult male, three young individuals still dependent on their parents, and 40 young independent individuals performed these behaviors. All SBTSOs were typical of male sexual behavior. Although only three young individuals were identified as male, the other young were presumed to be males. I suggest the adaptive value of these behaviors in the Black-winged Stilt.

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© 2022 Yamashina Institute for Ornithology
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