Based on 1,685 research-grade iNaturalist observations in Colorado, American Beaver is most often recorded in April; in Colorado it behaves like a seasonal. It ranks #16 among mammals recorded in the state in our data.
Castor canadensis
American Beaver in Colorado 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 Colorado in April
Places to look in Colorado
National ForestWhite River National Forest
Botanical GardenDenver Botanic Gardens
National ForestRio Grande National Forest
National ForestSan Juan National Forest
State ParkRoxborough State Park
State ParkMancos State Park
FAQ
When does American Beaver appear in Colorado?
Mainly March–October, with the most records in April.
How common is American Beaver in Colorado?
It ranks #16 by number of iNaturalist observations among mammals in Colorado (1,685 records in our sample).