Consider the spatial memory of Clark’s nutcrackers, which live at high altitudes in the western United States (our neck of the woods). During the summer, a bird will hide upwards of one hundred thousand seeds throughout its territory. Did you get that? 100,000 seeds, each in a unique location. During the winter, they retrieve the exact same seeds they hid nine months before, finding them even under a blanket of snow.
Imagine the graduate students who spent their summers and winters finding this out! Not bad work, and better to my mind than building blinders for dung beetles.
Hat tip: The Genius of Dogs, by Brian Hare and Vanessa Woods.