With operant conditioning you can train a crow to do just about anything.
As annoying as crows can be at 5:30 AM if you have a bunch near your house, it is hard not to admire them. They are very interesting creatures. My favorite story was related by a hunter:
Every year when he went deer hunting on his property, the crows would silently follow him around, making no noise, waiting until he bagged a deer and removed the gut-pack, after which they would swoop in for the feast. That part didn’t surprise him, he figured they knew a good thing when they saw it.
What he didn’t understand is how they seemed to know the exact day the hunting season would begin. When he would come out of his back door, ready to go, the crows were ready to go as well, sitting everywhere getting ready to follow him.
What the Hell...could crows read signs or calendars??? Then he realized one year, that they figured it out by watching him through his windows. As soon as he started pulling out all of his hunting gear, putting it on his dining room table, waterproofing his boots, cleaning his gun and such, the word got out in the crow world: He’s almost ready to go...be prepared to follow!