My five-year old son spotted this high up in our (lone) back-yard tree:
I think it's an eastern screech owl.
My wife thought it was a hornet's nest at first, but then my son said he saw it move. (I honestly don't know how he managed to spot it among the leaves and branches. Or why he was even studying the crown of the tree that closely. I wouldn't notice a puma in a tree.)
This is a bit more exotic than the raccoon I almost ran over yesterday.