Funding for this research was provided by:
European Research Council (339092 – E-Response)
Leverhulme Trust (ECF-2015-453)
Natural Environment Research Council (NE/N013832/1)
Text and Data Mining valid from 2019-01-08
Received: 19 July 2018
Accepted: 16 December 2018
First Online: 8 January 2019
: Sampling of the reference bird was done under protocol number CTE 07.05 Adendum I, from the Animal Experiment Committee from the Royal Netherlands Academy of Sciences (DEC-KNAW) to KvO.
: Not applicable.
: Martien A.M. Groenen is a member of the editorial board (associate editor) of this journal.
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