Last week I was feeding the local crows peanuts (in the shell).
The crows wait for me outside at dog walking time, and follow us on our walk.
When dishing out peanuts I noticed one crow take one and fly to a grassy spot, dig a hole with its beak and drop the peanut in. It then plucked nearby moss and stuffed it into the hole on top. And stomped it flat. Then came back wanting another peanut.
I didn't realized crows did food caching like squirrels.