Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com. Why do flocks of birds swoop and swirl together ...

If you’re in Alabama’s Black Belt this summer, perhaps for this weekend’s birding festival, you’ll almost certainly get to see this haunting bird circling overhead. “It’s like going to an air show ...