The give away on the nest at 120th and Federal is the portable road sign telling people not to stop. Of course there are always a few people who just don't read signs.
In the swamp behind our neighborhood in Southern Maryland, there were several breeding pairs of Bald Eagles. The first time you see an adult bird standing in the middle of a field, it is pretty surprising just how big they are. They are scavengers. I actually prefer to watch the hawks hunt p-dogs.