Did you know that you can identify birds with a key? Not a metal key (duh!), but a structured list of ID features. You start at the top, with number one. Then decide which option sounds right. Then you jump to the next number and work your way down the list. Hopefully you will end up with the right answer. But first you have to decide if your bird is a swift or a swallow – see the tips on p. 256 of the book for hints. Good luck!