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29 December 2021 Interspecific parental care by a European Starling (Sturnus vulgaris) at the nest of a Hairy Woodpecker (Dryobates villosus)
Dominic Janus, Elizabeth A. Gow
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The European Starling (Sturnus vulgaris) is a cavity-nesting species that aggressively competes with other cavity nesters, such as woodpeckers, and usurps their nest cavities. Interspecific parental care among birds is uncommon and scarcely reported for European Starlings and woodpeckers. Here, we report an observation of a clutch of 3 Hairy Woodpecker (Dryobates villosus) nestlings being fed by both an adult female Hairy Woodpecker and at least 1 adult European Starling in southern Ontario, Canada. There are differences in parental behavior observed between the starling and female Hairy Woodpecker, namely only the starling entered the cavity (7.0 times/h) and removed fecal sacs (4.2 times/h) while the female Hairy Woodpecker never showed these behaviors during our observation period, but she fed nestlings 7.4 times/h compared to 4.9 times/h by the starling. Although proximate causes of this behavior are unclear, nest site competition, overlap of the timing of breeding and preferred habitat, or the loss of the male woodpecker may have triggered this behavior.

Dominic Janus and Elizabeth A. Gow "Interspecific parental care by a European Starling (Sturnus vulgaris) at the nest of a Hairy Woodpecker (Dryobates villosus)," The Wilson Journal of Ornithology 133(2), 348-354, (29 December 2021).
Received: 15 February 2021; Accepted: 22 July 2021; Published: 29 December 2021
assainissement du nid
cavity-nesting birds
interspecific feeding
nest sanitation
nourrissage interspécifique
pic oiseaux cavernicole
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