January 1–December 31
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
University of New Hampshire
January 1–December 31
Maine, New Hampshire, New York, Vermont
Appalachian Mountain Club
January 1–December 31
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
Arnold Arboretum of Harvard University
January 1–December 31
Maine, Massachusetts, New Hampshire
New Hampshire Sea Grant
January 1–March 31
New Hampshire
New Hampshire Fish and Game
January 1–December 31
New Hampshire
UNH Cooperative Extension
January 1–December 31
New Hampshire
UNH Cooperative Extension
January 1–December 31
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
January 1–February 28
New Hampshire
Squam Lakes Association
January 1–December 31
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
Northern Essex Community College
January 1–December 31
New Hampshire
New Hampshire Fish and Game
January 1–December 31
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
The University of Georgia Center for Invasive Species and Ecosystem Health
January 1–November 1
New Hampshire
The Nature Conservancy, New Hampshire Chapter
February 1–February 28
New Hampshire
New Hampshire Audubon
February 1–April 30
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
International Rusty Blackbird Working Group
March 1–May 31
New Hampshire
Harris Center for Conservation Education
March 1–September 30
New Hampshire
New Hampshire Fish and Game
March 1–September 30
Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont
New England Wildflower Society
April 1–September 30
New Hampshire
New Hampshire Fish and Game
April 1–September 30
New Hampshire
April 1–May 30
New Hampshire
Harris Center for Conservation Education
April 1–June 30
New Hampshire
New Hampshire Fish and Game
May 1–August 31
New Hampshire
New Hampshire Audubon
May 1–September 30
New Hampshire
May 1–August 1
New Hampshire
Society for the Protection of New Hampshire Forests
May 1–October 31
New Hampshire
Gundalow Company
May 1–July 31
New Hampshire
New Hampshire Fish and Game
May 1–September 30
Maine, New Hampshire, New York, Vermont
Appalachian Mountain Club
May 1–September 30
New Hampshire
New Hampshire Rivers Council
May 1–June 30
Maine, Massachusetts, New Hampshire
New Hampshire Sea Grant
May 1–July 1
New Hampshire
Coastal Research Volunteers
May 15–August 31
New Hampshire
New Hampshire Fish and Game
June 1–October 30
New Hampshire
The Nature Conservancy, New Hampshire Chapter
June 1–September 30
New Hampshire
UNH Cooperative Extension
June 1–August 31
New Hampshire
Upper Merrimack River Local Advisory Committee
June 1–September 30
New Hampshire
Margaret and H. A. Rey Center
June 1–June 30
Maine, New Hampshire, New York, Vermont
Vermont Center for Ecostudies
June 1–June 30
Maine, New Hampshire, New York, Vermont
Vermont Center for Ecostudies
June 1–July 30
New Hampshire
New Hampshire Fish and Game
July 1–July 31
New Hampshire
Loon Preservation Committee
July 1–August 31
New Hampshire
NH Bugs
August 1–October 30
Maine, Massachusetts, New Hampshire
New Hampshire Sea Grant
December 1–January 31
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
National Audubon Society
January 1–December 31
Maine, Massachusetts, New Hampshire, New York, Vermont
January 1–December 31
New Hampshire
UNH Cooperative Extension & NH Division of Forests and Lands
May 1–October 31
New Hampshire
July 24–August 2
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
Monarch Larva Monitoring Project
August 1–August 31
New Hampshire
Strafford Regional Planning Commission
January 1–June 30
Maine, Massachusetts, New Hampshire, New York, Vermont
Chronolog
February 1–February 15
Maine, New Hampshire, Vermont
CSO and Appalachian Mountain Club
