There are lots of reasons to photograph birds. For one, it’s lots of fun (although all-too-often frustrating as well). Photos can provide a record of birds you’ve seen, especially if, like me, you start second-guessing your best sightings the minute the bird flies away. They provide proof to ebird and records committees that your rarity was indeed what you thought it was.
Perhaps you’re birding in an unfamiliar location. You may not immediately recognize all the birds you see, and photos might allow you to ID some species later, when you’re not in a hurry.
Photos can also be artistic. Everyone can be creative—it’s part of our DNA—and photography makes a wonderful creative outlet.