... a cache on the forest floor created by red squirrels to store food for the winter is called a 'midden'? It looks like a mound of dead leaves and debris at the base of a tree. It features burrowing holes and sometimes visible stashes of pinecones or other food items.
Thanks to VELMA HUDSON for the photos.
For a wonderful article on red squirrels visit: http://www.donmeredith.ca/article-forest-chickaree.php