January 1–November 1
New Hampshire
The Nature Conservancy, New Hampshire Chapter
January 1–December 31
Maine, New Hampshire, New York, Vermont
Appalachian Mountain Club
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
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
The University of Georgia Center for Invasive Species and Ecosystem Health
January 1–December 31
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
University of New Hampshire
January 1–December 31
New Hampshire
New Hampshire Fish and Game
January 1–December 31
Maine
January 1–December 31
Maine, Massachusetts, New Hampshire
New Hampshire Sea Grant
January 1–December 31
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
Arnold Arboretum of Harvard University
January 1–December 31
Maine
January 1–March 31
New Hampshire
New Hampshire Fish and Game
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–December 31
New Hampshire
UNH Cooperative Extension
February 1–April 30
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
International Rusty Blackbird Working Group
February 1–February 28
New Hampshire
New Hampshire Audubon
February 21–December 31
Massachusetts
Mass Audubon
March 1–September 30
Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont
New England Wildflower Society
March 1–May 31
New Hampshire
Harris Center for Conservation Education
March 1–November 30
Massachusetts
Arnold Arboretum of Harvard University
March 1–September 30
New Hampshire
New Hampshire Fish and Game
April 1–September 30
New Hampshire
New Hampshire Fish and Game
April 1–July 31
Maine
April 1–May 30
New Hampshire
Harris Center for Conservation Education
April 1–June 30
New Hampshire
New Hampshire Fish and Game
April 1–September 30
New Hampshire
April 1–September 30
Vermont
Bennington County Conservation District
April 1–September 1
Maine
Maine Audubon
April 13–June 4
Massachusetts
Mass Audubon
May 1–October 31
New Hampshire
Gundalow Company
May 1–June 30
Maine, Massachusetts, New Hampshire
New Hampshire Sea Grant
May 1–September 30
New Hampshire
New Hampshire Rivers Council
May 1–August 1
New Hampshire
Society for the Protection of New Hampshire Forests
May 1–August 31
New Hampshire
New Hampshire Audubon
May 1–July 1
New Hampshire
Coastal Research Volunteers
May 1–September 30
Maine, New Hampshire, New York, Vermont
Appalachian Mountain Club
May 1–July 31
New Hampshire
New Hampshire Fish and Game
May 1–September 30
New Hampshire
May 11–July 31
Maine
University of Maine Cooperative Extension
May 15–August 31
New Hampshire
New Hampshire Fish and Game
June 1–September 30
New Hampshire
UNH Cooperative Extension
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–July 30
New Hampshire
New Hampshire Fish and Game
June 1–June 30
Maine, New Hampshire, New York, Vermont
Vermont Center for Ecostudies
June 1–October 30
New Hampshire
The Nature Conservancy, New Hampshire Chapter
June 1–August 31
New Hampshire
Upper Merrimack River Local Advisory Committee
July 1–August 31
New Hampshire
NH Bugs
July 1–July 31
New Hampshire
Loon Preservation Committee
July 1–July 31
Maine
Maine Audubon
July 1–October 30
Maine
Schoodic Institute at Acadia National Park
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
New Hampshire
UNH Cooperative Extension & NH Division of Forests and Lands
January 1–December 31
Maine, Massachusetts, New Hampshire, New York, Vermont
May 1–October 31
New Hampshire
July 24–August 2
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
Monarch Larva Monitoring Project
January 1–June 30
Maine, Massachusetts, New Hampshire, New York, Vermont
Chronolog
January 1–December 31
Maine
Southern Maine Conservation Collaborative
February 1–February 15
Maine, New Hampshire, Vermont
CSO and Appalachian Mountain Club
January 1–December 31
Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont
University of New Hampshire