Black-capped Chickadee

From Upper Mississippi River National Wildlife and Fish Refuge:

What do black-capped chickadees, crows, and squirrels have in common? All are winter residents of Wisconsin and have the neat habit of hiding their food to find again in cold weather. These little birds can find food that they've hidden for up to a month afterwards! That's some memory!

Photo credit: PutneyPics Flickr Creative Commons