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    Are invasive House Sparrows a nuisance for native avifauna when scarce? 

    García-Arroyo, Michelle; Santiago-Alarcon, Diego; Quesada, Javier; Mac-Gregor-Fors, Ian (2020-03-14)

    Biological invasions are the second most important cause of species extinction. Aided by processes such as transportation and urbanization, exotic species can establish and spread to new locations, causing changes in the ...

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    Bold or shy? Examining the risk-taking behavior and neophobia of invasive and non-invasive house sparrows 

    Quesada, Javier; Chávez-Zichinelli, Carlos A.; García-Arroyo, Michelle; Yeh, Pamela J.; Guevara, R.; Izquierdo-Palma, J.; MacGregor-Fors, Ian (2022-03-01)

    Dado que el comportamiento proporciona un marco útil para comprender la especialización, la personalidad animal puede ayudar a explicar la capacidad invasiva de las aves. La invasión implica la dispersión por áreas ...

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    Records of fatal attacks by Rose-ringed parakeets "Psittacula krameri" on native avifauna 

    Covas, Laia; Senar, Juan Carlos; Roqué Roqué, Laura; Quesada, Javier (2017-11-07)

    Interspecific interactions between invasive and native fauna are poorly studied. Here we report six fatal attacks by Rose-ringed Parakeets Psittacula krameri, one of the most successful invasive avian species in Europe, ...

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    Space invaders: house sparrow densities along three urbanagricultural landscapes 

    MacGregor-Fors, Ian; Quesada, Javier; Lee, Jeffrey G.-H.; Yeh, Pamela J. (2017-12)

    One of the most successful avian urban invaders is the House Sparrow (Passer domesticus). Here, we examine House Sparrow numbers in the urban-agricultural landscape of three cities, one where the sparrow is native (Barcelona) ...

    What’s next? The release of exotic pets continues virtually unabated 7 years after enforcement of new legislation for managing invasive species 

    Maceda-Veiga, Alberto; Escribano-Alacid, Josep; Martínez-Silvestre, Albert; Verdaguer, Isabel; Mac Nally, Ralph (2019-05-29)

    There are many pathways by which invasive species are introduced and become established, with the exotic pet trade becoming an increasingly important route. The abandonment of pets is a growing problem, which has been ...