Funding for this research was provided by:
Natural Sciences and Engineering Research Council of Canada (312379-2009)
Text and Data Mining valid from 2018-05-17
Received: 15 September 2017
Revised: 11 April 2018
Accepted: 7 May 2018
First Online: 17 May 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: Permits are not necessary for the collection of magpies in Canada. Scrub jays were transferred from a previous research laboratory with permission from appropriate federal agencies. All procedures were in accordance with the ethical standards of University of Manitoba’s Animal Care Committee (Protocol #F14037) and complied with the guidelines set by the Canadian Council on Animal Care.