Based on 3,086 research-grade iNaturalist observations in Massachusetts, American Beaver is most often recorded in April; in Massachusetts it behaves like a seasonal. It ranks #7 among mammals recorded in the state in our data.
Castor canadensis
American Beaver in Massachusetts by month
Bars show research-grade observations per month. They mix true seasonality with how often people are outdoors, so treat small numbers with caution.
Also seen in Massachusetts in April
Eastern Gray Squirrel
Eastern Cottontail
White-tailed Deer
Eastern Chipmunk
Common Raccoon
Muskrat
American Red Squirrel
Coyote
Places to look in Massachusetts
Botanical GardenArnold Arboretum
Botanical GardenBoston Public Garden
Botanical GardenBerkshire Botanical Garden
State ParkHalibut Point State Park
State ParkHammond Pond Reservation
State ParkTolland State Forest
FAQ
When does American Beaver appear in Massachusetts?
Mainly March–June, with the most records in April.
How common is American Beaver in Massachusetts?
It ranks #7 by number of iNaturalist observations among mammals in Massachusetts (3,086 records in our sample).