This little quiz / challenge is on Enature.com. You enter your zip code and it gives you a bird call. You are given 5 different calls. Each bird call comes with 3 birds to choose from. It's a pretty cool way to test your knowledge of bird calls. I took the challenge and got 4 out of 5. You can enter any zip code and run through challenge and see how you do with regions that you don't live in. You can also take the challenge a second time for your zip code. Pretty cool! Try it out!