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
Arnold Arboretum of Harvard University
January 1–December 31
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
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
February 1–April 30
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
International Rusty Blackbird Working Group
March 1–September 30
Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont
New England Wildflower Society
December 1–January 31
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
National Audubon Society
July 24–August 2
Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
Monarch Larva Monitoring Project
January 1–December 31
Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont
University of New Hampshire