Wellfleet Bay Wildlife Sanctuary
- 1,000 acres of woodlands, wetlands, and grasslands attract an exciting variety of wildlife, especially songbirds and shorebirds. Five miles of scenic trails wind through these habitats and provide a lovely view of Cape Cod Bay.
- http://www.wellfleetbay.org/

Massachusetts Audubon Society
- The largest conservation organization in New England, the Society protects land/wildlife habitat, conducts nature education and advocates for environmental policies. It maintains 37 wildlife sanctuaries within the Commonwealth.
- http://www.massaudubon.org/