Ornithology, you should know, is the study of avifauna. And since you came to this section, you know someone who studies them, at least as a hobby. People who observe avifauna (or what you or I would call “birds”) are called birdwatchers or, alternately, birders. Now that we've gotten that out of the way, take a gander at some of the following gift ideas for the birder you know.