I’m reading “The Genius of Birds by Jennifer Ackerman. It’s about how intelligent birds are, especially certain species. Gabi Mann, an eight-year old Seattle girl began feeding crows when she was four. She’d leave them peanuts on a tray in her backyard. After the peanuts were consumed, trinkets began to show up on the tray: an earring, screws, hinges, buttons, crab claw, and her favorite thing, an opalescent white heart. Leaving gifts suggests that crows understand the benefit of reciprocating past acts that have benefitted them and also that they anticipate future rewards. How amazing is that?