My wife's been listening to "A Most Remarkable Creature" by Jonathan Melburg, and though I haven't been able to hear long stretches, it is excellent, about birds of prey, caracaras and similar raptors that exhibit remarkable intelligence. The author is steeped in the subject and all of the humans who get involved with these birds, and presents many stories in a riveting way.
My wife liked it so well, she ordered a copy in print, and I believe I'll go back and read the whole thing. One bird was named Tina and would engage her people in all kinds of games, steeling the keys to the aviary and nipping their ears if they didn't deliver treats. She could discern shapes and deliver selected toys on verbal commands. It is always a question about who is training who. It seemed apparent that Tina stayed with the people because she found it pleasant, not because she couldn't get away. She liked having a staff.