On the lookout for danger: House Sparrow alert distance in three cities

dc.contributor.author Mac-Gregor-Fors, Ian ca
dc.contributor.author Quesada, Javier ca
dc.contributor.author Lee, Jeffrey G.-H. ca
dc.contributor.author Yeh, Pamela J. ca
dc.contributor.other Consorci del Museu de Ciències Naturals de Barcelona ca
dc.date.accessioned 2025-11-05T13:10:34Z
dc.date.available 2025-11-05T13:10:34Z
dc.date.issued 2019-06-17
dc.description The House Sparrow Passer domesticus, closely associated with human presence along urban–agricultural landscapes and widely distributed outside its native range, has shown great morphological and physiological variations, with its plasticity linked to its invasiveness. Yet, there is a dearth of knowledge on the escape behavior of this sparrow along its North American invasion range. We here assessed House Sparrows alert distances in Los Angeles and Mexico City, but also in Barcelona as a control within its native distribution, considering ‘city’, ‘sex/age’ (adult males vs. adult females and juveniles), and ‘flock size’ as alert distance predictors. Through a linear model and a classification and regression tree, we identified that House Sparrow alert distances in Barcelona were significantly larger when compared to both studied North American cities (Los Angeles, Mexico City). Given that alert distances were also significantly larger in Los Angeles when contrasted with those from Mexico City, where it has been recently shown to be hyper-abundant, our results also suggest that its boldness could be related not only to an origin (native/non-native) driver, but also to a density-dependent process.
dc.format application/pdf ca
dc.format.extent 21 p. ca
dc.identifier http://hdl.handle.net/2072/374643
dc.identifier https://doi.org/10.1007/s11252-019-00874-6
dc.identifier.citation Urban Ecosystems 22, 955–960 (2019) ca
dc.identifier.entitat consorcis ca
dc.identifier.uri http://hdl.handle.net/11703/120755
dc.language eng ca
dc.provenance Recercat (Dipòsit de la Recerca de Catalunya) ca
dc.rights This is a post-peer-review, pre-copyedit version of an article published in Urban Ecosystems. The final authenticated version is available online at: https://link.springer.com/article/10.1007/s11252-019-00874-6. Terms of use: https://www.springer.com/gp/open-access/publication-policies/aam-terms-of-use
dc.rights info:eu-repo/semantics/openAccess
dc.subject Pardals ca
dc.subject Barcelona (Catalunya) ca
dc.subject Ecologia urbana ca
dc.subject.category Ciència i tecnologia ca
dc.subject.forma articles ca
dc.title On the lookout for danger: House Sparrow alert distance in three cities
dc.type info:eu-repo/semantics/article
dc.type info:eu-repo/semantics/acceptedVersion
dc.type.driver info:eu-repo/semantics/article ca
metadadalocal.dependencia 8008920

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