We have a couple bluejays that we’ve been feeding for a long time. Usually we feed them raw peanuts in the shell. They end up hiding most of the nuts, burying them in yard or stuffing them in trees and shrubs. This makes sense – they can come back and find at least some of them at a later date.
Occasionally we feed them mealworms, and they do the same thing. To me, it seems like a bad idea. If the worm is dead, it’s not going to last very long, and if it’s alive, wouldn’t it crawl away? But animals are usually pretty clever in areas where they need to be clever, so maybe the jays know something I don’t?