Ant mound of forest litter on rotted stump made by some species of thatching ant (genus <i>Formica</i>).  The mound is covered by worker ants going out to forage, as they do on dry days.
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/37981247@N00">Michael Wassmer</a> from France
CC BY 2.0
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