Alewife Brook Reservation is a Massachusetts state park and urban wild located in Cambridge, Arlington, and Somerville. The park is managed by the state Department of Conservation and Recreation and was established in 1900. It is named for Alewife Brook, which was also historically known as Menotomy River (the village of Menotomy is now Arlington), a tributary of the Mystic River.DescriptionA large proportion of the park is wetland, including the Little River, though there is also a wooded upland and meadow area. The reservation serves as a habitat for numerous indigenous and migratory birds. Common species include osprey, great blue heron and the woodcock, whose unusual mating ritual may sometimes be observed by visitors. Additionally, the park's ponds (Little Pond, Perch Pond, and Blair Pond) provide spring spawning grounds for anadromous herring, which migrate from the Atlantic Ocean via the Mystic River and Alewife Brook, a tributary which, in turn, drains the Little River.