Birding at Night > Detect Migrating Birds with a Plastic Dish and a Cheap Microphone

Birding is booming. You may realize your local nature spots are especially busy during seasonal migrations, when birds move between their summer and winter grounds. Species that you had been noticing disappear may have been replaced by ones that hadn't been there before. Or you may have seen migrating birds on the wing—say, a flock of geese flying in their famous V-formation. Even if you're not a dedicated birder, you've probably made such observations throughout your life. So it might come as a surprise to learn that you've been missing out on most of this action, which takes place at night. But, as I discovered, with some simple electronics and the right software, you can identify nocturnal migrators with ease!