Based on 1,252 research-grade iNaturalist observations in New Jersey, American Beaver is most often recorded in March; in New Jersey it behaves like a seasonal. It ranks #8 among mammals recorded in the state in our data.
Castor canadensis
American Beaver in New Jersey 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 New Jersey in March

Eastern Gray Squirrel

White-tailed Deer

Eastern Cottontail

Common Raccoon
Red Fox

Groundhog
Eastern Chipmunk

Harbor Seal
Places to look in New Jersey
Drew University
Liberty State Park
Willowwood Arboretum
Herrontown Woods Arboretum
Wawayanda State Park
Island Beach State Park
FAQ
When does American Beaver appear in New Jersey?
Mainly November–July, with the most records in March.
How common is American Beaver in New Jersey?
It ranks #8 by number of iNaturalist observations among mammals in New Jersey (1,252 records in our sample).