The National Zoo is in/next to Rock Creek park. Rock Creek park is heavily wooded and extends from well outside the beltway all the way to the Potomac river.
There are a lot of Deer in the DC Suburbs and I have seen seen browse damage within city limits.
Well, that just goes to show my knowledge of DC geography.
I was there only once in my life and since we came in by the main entrance, there was nothing that looked like protected anything that way.
Alrighty then......
I’ve seen them in the traffic circle by American University.