<p>The caribou are missing, but their signs are obvious. Tracks criss cross the sand as the Western Arctic Caribou Herd makes it's way south for the winter. 
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Aerial view of lines of tracks on the sand.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/41585865@N06">Western Arctic National Parklands</a>
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<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/nps_wear/8490153698/">Something Was On The Move</a>