Government
Local
Arlington
Belmont
Boston
Brookline
Cambridge
Cambridge Water Department
Lexington
Somerville

State of Massachusetts
Executive Office of Environmental Affairs
Department of Environmental Protection

Federal
Environmental Protection Agency
US Fish and Wildlife Service Endangered Species Program
United States Geological Survey

Community
Belmont Citizens Forum
Cambridge Civic Journal
Cambridge Climate Calendar
Cambridge Greenspace Alliance
Friends of Alewife Reservation
Friends of Arlington Great Meadows
Friends of Spy Pond
Friends of Menotomy Rocks

Public Schools
Cambridge Public Schools
CPS Science Department

Universities
Harvard Museum of Natural History

Watershed
Charles River Watershed Association
Massachusetts Water Resources Authority
Mystic River Watershed Association

Birds
Brookline Bird Club
Massachusetts Audubon Society
Mass Bird.org
Menotomy Bird Club

Plants
Arnold Arboretum
Garden in the Woods
Invasive Plants Atlas of New England
Massachusetts Natural Heritage and Endangered Species Program
Mount Auburn Cemetery
New England Wildflower Society
New England Ferns

Insects, Fungi and More
Tom Murray Photo Gallery
Mass. Audubon Society Butterfly Atlas
Massachusetts Butterfly Club

History
Cambridge Historical Commission
Cambridge Historical Society

Fresh Pond
Photos by Richard Gardner