This study has received ethical approval from the University of Leeds Faculty of
Biological Sciences Ethics Committee reference BIOSCI 16-006. If you would like any further
information, please contact Dr Christopher Hassall (email@example.com).
like to thank Steven Falk (http://www.stevenfalk.co.uk) for permitting the use of many of his photos,
and contributions from Peter Waters (http://www.123rf.com/profile_peterwaters), Malcolm Storey (http://www.bioimages.org.uk/), Kim Abel (http://data.artsdatabanken.no/Pages/162299) and Arnstein Staverlokk (http://data.artsdatabanken.no/Pages/133468). All images used according to permissions. Please contact Chris Hassall for photographers' details
if you would like to reuse any images.