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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Natal dispersal and recruitment of Barn Swallows Hirundo rustica in an urban habitat (2020)
Auteurs :	Peter G. Teglhøj, Auteur
Type de document :	Article
Dans :	Bird Study (67(4) October, 2020)
Article en page(s) :	420-428
Mots-clés:	Barn Swallow ; artificial nest ; natal dispersal ; nestling mass ; recruitment ; urban habitat
Résumé :	Capsule Barn Swallow Hirundo rustica nestlings exhibited higher local recruitment when the body mass was high and when raised in an artificial nest early in the breeding season.Aims To determine natal dispersal and recruitment of Barn Swallows breeding in artificial nests and natural nests in an urban habitat.Methods During the breeding seasons of 2012–2018 a total of 3907 Barn Swallow nestlings were ringed and in the breeding seasons of 2016–2019 adult Barn Swallows were recaptured to assess natal dispersal distances and local recruitment.Results Female Barn Swallows dispersed from their natal nest sites on average 2.5 times further than the males. Nestling mass predicted future recruitment probability, and the mean nestling body mass of recruits was higher than the mean body mass of their non-recruited siblings. A significantly larger than expected number of recruits originated from first broods, reflecting that the timing of Barn Swallow breeding is an important factor for future recruitment. Neither nest type nor brood type affected natal dispersal. Barn Swallows raised in artificial nests were recruited more than birds raised in natural nests.Conclusion Natal dispersal of Barn Swallows in urban habitats was sex-biased, with females dispersing further than males. A Barn Swallow nestling raised early in the season (1st broods), in a clean artificial nest, and with good competitive skills for food, had a high probability of survival and local recruitment. For a declining passerine species, such as the Barn Swallow, artificial nests may be a possible conservation option in urban habitats.
En ligne :	https://doi.org/10.1080/00063657.2021.1924618

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