|Great Meadows National Wildlife Refuge|
IUCN category IV (habitat/species management area)
View of Great Meadows, Concord
|Location||Concord, Massachusetts, Sudbury, Massachusetts, United States|
|Nearest city||Concord, Massachusetts|
GREAT MEADOWS NATIONAL WILDLIFE REFUGE Latitude and Longitude:
|Area||250 acres (100 ha)|
|Governing body||U.S. Fish and Wildlife Service|
|Website||Great Meadows National Wildlife Refuge|
The Great Meadows Wildlife Refuge is a 12-mile-long (19 km) river wetlands conservation area, in two major parcels, stretching from the towns of Billerica, Massachusetts (downstream) to Wayland, Massachusetts (upstream), along the Concord River and Sudbury River.
The original 250-acre (1.0 km2) Concord, Massachusetts parcel that was the beginning nucleus of the sanctuary, has been known as the "Great Meadows" since the 17th century.  The parcel was donated to the U.S. Government by Concord resident Samuel Hoar in 1944.   Hoar purchased a part of the Meadows in 1928, and built earthen dams (dikes) to hold the water within the marshlands, enhancing their value as waterfowl habitat for hunting. To provide greater protection for the area’s wetlands and wildlife, the U.S. Fish and Wildlife Service began buying additional land during the 1960s. 
A great diversity of birds have been recorded at the refuge, including nesting waterfowl: mallards, black ducks, wood ducks, and blue-winged teal. White-tailed deer, muskrats, red fox, raccoons, cottontail rabbits, weasels, beaver, squirrels, and a variety of small mammals are common. Many species of amphibians and reptiles are active during the warmer months. 
The Concord unit is primarily two small lakes (referred to as "pools" or "impoundments") that are drained into the Concord River every summer. The resulting mudflats provide ideal feeding grounds for many species of shore birds and waterfowl that migrate in mid to late summer. In late July and in August, there will be wide range of birds at these feeding grounds, including various species of sandpipers, killdeer, lesser and greater yellowlegs, and great egrets. Large numbers of great blue herons, ducks and Canada geese are also attracted to these muddy and nutrient-rich feeding grounds. 
The Sudbury unit of the refuge includes the headquarters and a visitor center. It is located in Sudbury, Massachusetts and is open weekdays.
- Great Meadows National Wildlife Refuge United States Fish and Wildlife Service, United States Department of the Interior. Retrieved January 1, 2007.
- Donahue, Brian (2004). The Great Meadow: Farmers and the Land in Colonial Concord. Yale Agrarian Studies Series. New Haven, Connecticut USA; London, England: Yale University Press. ISBN 978-0-300-12369-2.
- Wilson, Leslie Perrin (August–September 1999). "Papers of the Legendary Hoar Family". Concord Magazine. Archived from the original on October 28, 2006. Retrieved December 1, 2006.
- Robbins, Paula. "Hoar Family". Dictionary of Unitarian and Universalist Biography. Retrieved December 24, 2009.
- "Great Meadows National Wildlife Refuge". United States Fish and Wildlife Service, United States Department of the Interior. August 2007. Retrieved 2009-06-13.
- "Great Meadows National Wildlife Refuge: Concord Unit Trails" (PDF). United States Fish and Wildlife Service, United States Department of the Interior. Retrieved 2009-06-13.
Media related to Great Meadows National Wildlife Refuge at Wikimedia Commons