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Authors
Moreno-Opo, Rubén http://orcid.org/0000-0003-0149-9176
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Article History
Received: 17 November 2019
Accepted: 17 February 2020
First Online: 22 February 2020
Ethics approval and consent to participate
: This work complies with the current laws regarding wild species protection of Spain (Act 42/2007) and the European Union (Birds Directive 2009/147/CE). The experimental capture and study in hand of the birds were performed counting on permits granted by the competent authority (Comunidad de Madrid) based on derogations for research purposes (art. 61 of Spanish Act 42/2007).
: Not applicable.
: The author declares that he has no competing interests.
