The Red Fox (Vulpes vulpes) is a fairly common canine scampering around Maryland. I have seen Red Foxes at Eastern Neck Island, Blackwater Refuge and come across tracks in other areas including Canal WMA.
The Fox is usually pretty quick however, and if he/she is out during the day, you’re not gonna have a great shot at one without a quiet approach or a good zoom.
The image above was snagged at Middle Run Natural Area, which borders White Clay Creek in Delaware. The park is just over the Md-Del border in Newark. I spied this guy sitting back in the woods watching the cars that rolled up the gravel road to a common parking area.