Funding for this research was provided by:
The UK Wolf Conservation Trust
The Coalbourn Charitable Trust
Ann Vernon Memorial Travel Fund
Sir Ian McKellen
Text and Data Mining valid from 2018-04-13
Received: 13 June 2017
Accepted: 27 March 2018
First Online: 13 April 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest in the authorship of this article. Use of product or corporation names is for descriptive purposes only and implies no endorsement by any author or affiliation.
: All applicable institutional and/or national guidelines for the care and use of animals were followed.