Yellowstone. Mollies Pack Wolves Baiting a Bison.
Doug Smith
2011
<p><a rel="nofollow" class="external text" href="http://www.nps.gov/yellowstone/tours/thismonth/feb2005/doug/molliesbison.htm">National Park Service</a> <sup class="noprint Inline-Template"><span style="white-space: nowrap;">[<span style="font-style:italic;"><span title="" class="plainlinks"><a class="external text" href="https://en.wikipedia.org/wiki/Wikipedia:Link_rot">dead link</a></span></span>]</span></sup>; available <a rel="nofollow" class="external text" href="https://web.archive.org/web/20070301003407/http://www.nps.gov/yell/tours/thismonth/feb2005/doug/molliesbison.htm">on the Wayback Machine</a>.<br></p>
Used in <a rel="nofollow" class="external text" href="http://www.sciencedirect.com/science/article/pii/S0376635711001884">Muro et al, 2011</a> -- this image is figure 1(d). The citation there suggests that it was not taken by the authors.