In a lower limb of our magnolia tree is a 25" diameter birdnest made of magnolia leaves, mostly, and right in the middle of the bottom We can see straw/hay and moss. Something is pooping on my car, also. We live on a bayou on high ground off a bay, not far from the Gulf of Mexico. We have squirrels galore, but they always nest in the tops of tall trees. We have a lot of mature oaks. Big poops are falling out of the nest. I am thinking sea bird, but wonder what you guys think. We are moving the car tomorrow.