That easement was renewed in 1978 by the Elizabethtown Water Company, owner of the tract, and Princeton Township, grantee of record. The name of the refuge was changed in the spring of 1977 to memorialize Charles H. Rogers, a nationally known ornithologist who died in February of that year and who had played a key role in establishing the sanctuary. There are a number of signs within the refuge, one of which explains the importance of marshes and swamps. Preservation of this habitat is particularly worthwhile because marshes are disappearing at an alarming rate. The refuge's diversity of habitat attracts a corresponding diversity of mammals, including whitetail deer, striped skunk, opossum, raccoon, eastern cottontail, red and gray squirrel and wood chuck.
Muskrat houses create numerous small hummocks in the marsh.
A variety of frogs and turtles also live there. When the sun is hot, turtles lie along the logs. There are many kinds of snakes in the area. Equally diverse is the plant life. In the spring yellow trout lilies, violets and spring beauties carpet the woodlands and yellow iris blooms in pools at the edge of the marsh.