Oaks Bottom became Portland's first wildlife refuge in 1988, and in 2004 it was designated the Portland's first migratory bird park. The migratory bird park designation is thanks in part to a $50,000 grant from the U.S. Fish and Wildlife Service to maintain a refuge for thousands of migratory birds that make annual flights north and south.
Oaks Bottom offers a broad range of bird watching options, and nearly 200 bird species have been recorded at Oaks Bottom. Egrets, falcons, grebes, gulls, hawks, herons, hummingbirds, osprey, shorebirds, terns, vultures, waterfowl, and woodpeckers are just a few of the avians that you may see. The 141-acre site includes numerous pathways for hiking and bike riding as well as lookout points built into the hillside throughout.