首页|Changes in the Number of Naturalized Rose-ringed Parakeet Psittacula krameri at the Roosting Sites in the Metropolitan Area of Tokyo and Kanagawa, Japan

Changes in the Number of Naturalized Rose-ringed Parakeet Psittacula krameri at the Roosting Sites in the Metropolitan Area of Tokyo and Kanagawa, Japan

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The Rose-ringed Parakeet Psittacula krameri has expanded its distribution worldwide. Wild populations have been observed in the Japanese Archipelago since the late 1960s, and there are concerns about their potential impacts on ecosystems and conflicts with humans. However, their behavior and habits in urban environments are still not well understood. We counted the number of individuals at four known roosting sites from July 2015 to January 2016. The numbers fluctuated greatly at all roosting sites. Human activities and seasonal changes in the environment likely caused these changes. The roosting site formed on Tilia maximowicziana was abandoned following leaf fall, whereas the use of Ginkgo biloba was continued after leaf fall. The population density increased as the roosting number of individuals increased because the physical size of the roost remained unchanged, which may result in problems with noise and bird feces to humans.

GinkgoInvasive speciesNaturalized parrotPsittacula krameriRose-ringed Parakeet

Sumiko Nishida、Kousuke Watanabe、Wataru Kitamura、Masafumi Yoshida

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Environmental and Information Studies Division, Graduate School of Environmental and Information Studies, Tokyo City University, 3-3-1 Ushikubo-nishi, Tsuzuki-ku, Yokohama, Kanagawa 224-8551, Japan

Department of Natural Sciences, Faculty of Knowledge Engineering, Tokyo City University(Faculty of Science and Engineering in 2020), 1-28-1, Tamazutsumi, Setagaya-ku, Tokyo 158-8557, Japan

Department of Restoration Ecology and Built Environment, Faculty of Environmental Studies, Tokyo City University, 3-3-1 Ushikubo-nishi, Tsuzuki-ku, Yokohama, Kanagawa 224-8551, Japan

Department of Natural Sciences, Faculty of Science and Engineering, Tokyo City University, 1-28-1 Tamazutsumi, Selagaya-ku, Tokyo 158-8557, Japan

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2024

10.3312/jyio.56.l57

山階鳥類学雑誌

山階鳥類学雑誌

ISSN：1348-5032
年,卷(期)：2024.56(2)