Viceroy Butterfly on Harry's WayViceroy Butterfly on Harry's Way© 2013 Gary Freedman Upcoming Events Kids Activities Past Event Videos

Upcoming Events

Click on an event in the calendar to see the details on the event.

Note that most of our Monthly Meetings are recorded. Links to the recordings hosted by SudburyTV can be found on the Past Event Videos page.

April Exhibit of the Month

Signs of Spring

Melting snow and warming temperatures means that a variety of summer residents will be reappearing from their southern wintering grounds. See which animals you should keep an eye out for, including newly-born wildlife!

April Movie of the Month

The incredible Journey of Butterflies

Journey into the Monarch butterfly’s fascinating world, visiting the spectacular locations the Monarch calls home and fly with it on one of the most inspiring migratory odysseys imaginable.

NOTE: Movie will not be shown until 2pm on April 6th & 13th; will not be shown at all on April 27th; will only be shown 10am-1pm on April 28th.

Wednesday, May 1, 7:00 PM

Film: Racing Extinction

Please join Sustainable Sudbury at the Visitor Center at 7PM on Wednesday May 1st for a viewing of the documentary Racing Extinction. In Racing Extinction, a team of artists and activists exposes the hidden world of extinction with never-before-seen images that will change the way we see the planet. Two worlds drive extinction across the globe, potentially resulting in the loss of half of all species. The international wildlife trade creates bogus markets at the expense of creatures that have survived on this planet for millions of years. And the other surrounds us, hiding in plain sight — a world that the oil and gas companies don’t want the rest of us to see. Using covert tactics and state-of-the-art technology, the Racing Extinction team exposes these two worlds in an inspiring affirmation to preserve life as we know it. From the Academy Award® Winning Filmmakers of The Cove.

Saturday, May 4, 9:00 AM - Noon
Saturday, May 11, 9:00 AM - Noon
Saturday, May 18, 9:00 AM - Noon
Saturday, May 25, 9:00 AM - Noon

APT Invasive Plant Removal Work Party

It's time to remove invasive plants at Assabet River NWR! APT work session will be held every Saturday in May, starting at 9 AM and working until noon. Meet at the Visitor Center parking lot at 9 AM. Please wear long pants and bring insect repellant, sunscreen and water. Gloves and eye protection will be provided. Sessions are open to drop-ins.

At your first work session a Volunteer Service Agreement will need to be filled out; if the volunteer is a minor the Volunteer Service Agreement will need to be signed by a parent or legal guardian.

Contact Dave Lange for more information.

Saturday, May 4, 7:00 - 9:00 AM

Bird Walk with Nick Tepper

Join Nick for a morning bird walk along the meadows and marches in search of Rusty Blackbirds, Winter Wren, Swallows, and early wood warblers.

Meet at the White Pond Road entrance in Stow at 7:00 AM.

Sunday, May 5, 9:00 AM

Nature Walk with Cynthia Pratt

Join Cynthia to walk a 5 mile loop following the central trails of the refuge.

Meet in front of the Visitor Center at 9:00 AM. Rain cancels.

Wednesday, May 22, 7:00 PM

Monthly Presentation: The Conservation of Amphibians Locally and Globally by Bryan Windmiller

A recent United Nations report on the World’s biodiversity summarized evidence that a large proportion of global animal and plant species are threatened by human actions. Among those groups of species, amphibians - frogs, salamanders, and their relatives - are among the most endangered species. Among frogs alone, more than 100 species were driven to extinction in recent decades.

On May 22, Dr. Bryan Windmiller of Zoo New Englands’ Grassroots Wildlife Conservation will discuss the conservation of amphibians. He will discuss some of the reasons that frog diversity has declined particularly sharply in some regions of the World as well as the less bleak situation in New England.

Additionally, Bryan will discuss conservation efforts on behalf of local amphibian species, including reintroduction efforts on behalf of the two most threatened species in Massachusetts, the marbled salamander and the eastern spadefoot toad.

Bryan Windmiller was the founder and executive director of Grassroots Wildlife Conservation, a non-profit that integrated hands-on educational programs into the conservation of rare animal and plant species. Since late 2017, Bryan and his GWC staff have been incorporated into Zoo New England’s new Department of Conservation, of which Bryan is now the director. Bryan earned a PhD in biology and a Master's degree in Environmental Policy, both from Tufts University and has worked in various roles as a conservation biologist since 1987. His wife, Dr. Alison Robbins, is a wildlife veterinarian at Tufts University, and she and Bryan shared an appointment as visiting scholars studying amphibian epidemiology and conservation in Australia in 2006-2007.

Our monthly presentations are usually held the last Sunday of the month at 2:00 PM or the 4th Wednesday of every month at 7:00 PM at the Visitor Center at the Assabet River NWR.

By Appointment

Refuge Explorers

Calling all explorers: come join us for a monthly adventure! See nature come alive as we discover our surroundings and learn about the refuge from the pages of books to the forests and wetlands.

Refuge Explorers is a hands-on program for 6-10 year olds focused on getting kids outside and engaged in nature. Dress for the weather (rain or shine) and an adventure!

Family friendly, siblings welcome. Programs are by appointment, please contact Ranger Jared ( or 978-579-4028) to book your group’s Refuge Explorers program or for more information.


Outdoors This Week

The Friends posts our events to Outdoors This Week, a weekly listing of outdoor activities located west of Boston sponsored by local environmental organizations. Click here to subscribe.