The document discusses food caching behavior in Clark's nutcracker birds. The birds store over 33,000 seeds in thousands of caches and are able to recover the caches in the winter. Food caching is only useful if the birds can remember where the caches are located. Research shows the birds do not search randomly or rely on typical locations, smells, or visual cues when recovering caches. Their caching and recovery abilities suggest the birds may have episodic memory, allowing them to remember detailed episodes of what items were cached, where, and when.