Funding for this research was provided by:
Centre National de la Recherche Scientifique
Association for the Study of Animal Behaviour
Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada
Fonds de Recherche du Québec - Nature et Technologies
Animal Behavior Society
Society of Canadian Ornithologists
American Museum of Natural History
British Ornithologists’ Union
British Ecological Society
Received: 27 July 2020
Accepted: 15 March 2021
First Online: 9 April 2021
: Birds were caught, handled and ringed under a licence from the Stockholm Museum Ringing Centre (license number 471:M015 to B.D.) and behavioural tests were conducted in accordance with the Swedish legal requirements applicable in the year of the study.
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: The authors declare that they have no competing interests.