Habitat includes 494 acres of wetland and 359 acres of upland. Massie is an excellent basin to see shoreline, edge and grassland bird species and is one of the best Rainwater Basin lagoons for waterfowl and shorebirds. It is part of a large elliptical basin that once occupied almost 2 sections. Between 1997 and 2001 this marsh supported over 7,000 spring shorebirds. Waterfowl species include snow geese, greater white-fronted geese, Canada geese, pintails, and mallards.
An observation blind is located close to the parking lot on the south side of the lagoon.