Eyebrows?

While mowing, I almost ran over what I thought was dead baby bird. I prodded it with my foot, and it moved. Ten feet directly above it, was a very crowded nest. I got my ladder and returned the lost bird. I had to put him on top of his three siblings as there was no room left in the next, and I was sure I would find him again on the ground. I don't usually impose on nature, but since I was already there...I took a few pictures.

Done