The Credit River at Alton Wetland area contains the following mammals–raccoon, beaver, rabbit, fox, white tailed deer, coyote, eastern chipmunk, gray squirrel, striped skunk and porcupine. The Grange property is part of this area.
The Grange property has been part of a long-term bird monitoring station operated by the Universities of Wilfred Laurier and Guelph with some support from the CVC. This property provides deep interior forest habitat and subsequently supports a high diversity of bird species.
Forty-seven percent (34 species) of the 73 documented species that have been listed are recognized as a “Credit Watershed Bird Species of Conservation Concern. Examples of these species of concern include the Common Grackle, Eastern Kingbird, Gray Catbird and Ruffed Grouse.
As well the following herpetofauna have been documented on the property: Eastern American Toad; Green Frog; Mink Frog; Northern Spring Peeper; Wood Frog and Grey Treefrog. The following invertebrates have also been documented: Aphrodite Fritillary; Black Swallowtail; Cabbage White; Eastern Swallowtail; Monarch; and White Admiral.
Painted turtles and Snapping Turtles have also been seen in the Grange.