Archive for April 2021

By Daniel Melnechuk April 22, 2021
On April 6th, 2021, Sam Jaffe of The Caterpillar Lab delivered a deep picture into the world of native caterpillars using a combination of live presentation, digital microscope work, slides, and life history image plates. By exploring complex natural history stories involving caterpillars, their host plants, and their predators and parasitoids, the importance of biodiversity…
By Martha Creedon April 6, 2021
Seventeen people of all ages turned up to "plog"--pick up litter while jogging (or walking). Amazing WLT volunteer steward Amanda and her daughter led the activity. They collected litter from all sides of the Moody Street dam and along the Riverwalk to Prospect Street. Many thanks to NovaBio for allowing us to use their dumpster,…
By Martha Creedon April 6, 2021
Twenty walkers welcomed Spring with an easy stroll along the Charles River. A juvenile bald eagle soared high above and a swan swam quietly by as we gathered at the Woerd Ave boat launch. Walking through the woods we saw witch hazel and a turtle sunning itself on a log across the way. We checked…
By Martha Creedon April 5, 2021
Twenty-three avian enthusiasts participated in the WLT's annual duck walk along the Charles River. The group traveled from Shaw's at 130 River Street to Moody St. and back. They saw mallards, a Great blue heron, ring-necked ducks, robins, a Hooded merganser pair, a ring-billed gull, a male bufflehead, and a black duck. We also saw…

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January 23, 2026
Waltham’s open spaces are alive with birds year-round, providing breeding, wintering, and migratory habitat for more than 200 species. Learn all about it on our zoom meeting!
January 23, 2026
You’ll learn about common pollinators in the area, which native plants support them best, and how to use the Somerville Pollinator Action Plan to design your own garden on zoom!
January 23, 2026
The Natural History of the Cornelia Warren Estate: Camp Cedar Hill, Girl Scouts of Eastern North America by Lesley Sneddon Now Available! Camp Cedar Hill is a portion of the former estate of Cornelia Warren . In keeping with her desire to maintain the land for public benefit, Ms. Warren wished to carry this tradition beyond her life by stating so in her will. After her death, the Trustees of Cedar Hill deeded five parcels of the estate among several beneficiaries, including the Massachusetts Girl Scouts (now the Girl Scouts of Eastern Massachusetts). To this day, Cornelia Warren’s legacy of philanthropy and social welfare continue to benefit the residents of Waltham and beyond.
January 1, 2026
Join us for one of our most popular events of the year—our annual New Year’s Day hike!
December 31, 2025
Support our work preserving and restoring land for the enjoyment of humans and wildlife. Your donation will also help us expand our trail network in 2026!