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Meier, Christoph; Karaardic, Hakan; Aymi, Raül; Peev, Strahil G.; Bächler, Erich; Weber, Roger; Witvliet, Willem; Liechti, Felix (2018). What makes Alpine swift ascend at twilight? Novel geolocators reveal year-round flight behaviour Behavioral Ecology and Sociobiology, 72(3) Springer 10.1007/s00265-017-2438-6
