A great diversity of birds have been recorded at the refuge, including nesting waterfowl:
mallards,
black ducks,
wood ducks, and
blue-winged teal.
White-tailed deer,
muskrats,
red fox,
raccoons,
cottontail rabbits,
weasels,
beaver,
squirrels, and a variety of small mammals are common. Many species of amphibians and reptiles are active during the warmer months. The Concord unit is primarily two small lakes (referred to as "pools" or "impoundments") that are drained into the
Concord River every summer. The resulting
mudflats provide ideal feeding grounds for many species of shore birds and waterfowl that migrate in mid to late summer. In late July and in August, there will be wide range of birds at these feeding grounds, including various species of sandpipers, killdeer, lesser and greater yellowlegs, and great egrets. Large numbers of great blue herons, ducks and Canada geese are also attracted to these muddy and nutrient-rich feeding grounds. == Access and facilities ==