As a kid I adored being indoctrinated by my bird fanatic grandmother. I'd spend so much time looking through her Audubon's Guide to Eastern Birds (US), and she would help me identify anything that came to the feeder.
She died several years ago and that was the one thing of hers I asked for. Now my four-year-old daughter likes to look through it with me. I even bought her a brand new copy the book's western counterpart, since I live in western Canada now. I've even converted my wife who was once so ignorant of bird-related lore that she asked me one time if birds have ears.
Yes, they do have holes at the sides of their heads that are used to capture sounds. They usually skip the meat flaps we have around them though, in favour of some magnificent fluffy feathers