The camera I set up in a tree is proving to be an entertaining setup, especially in the morning. Here, a Blue Jay comes to hide one single seed and then a bit later comes back to retrieve it. The female Oriole came to check out the nesting material options. I put nesting wool (I got mine from Wild Birds Unlimited), grass and roots in there. Don't use dryer lint, hair from pets with treated fur, or yarns. Audubon has a nice article about what is safe for the birds to put out.