Based on 2,552 research-grade iNaturalist observations in Oregon, North American Porcupine is most often recorded in August; in Oregon it behaves like a year-round resident. It ranks #10 among mammals recorded in the state in our data.
Erethizon dorsatum
North American Porcupine in Oregon 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 Oregon in August
Common Golden-mantled Ground Squirrel
Mule Deer
Douglas's Squirrel
Townsend's Chipmunk
Douglas's Ground Squirrel
American Pika
Coyote
Coypu
Places to look in Oregon
National ForestWillamette National Forest
National ForestMount Hood National Forest
National ForestDeschutes National Forest
Botanical GardenHoyt Arboretum
Botanical GardenLeach Botanical Garden
National ForestUmatilla National Forest
FAQ
When does North American Porcupine appear in Oregon?
Mainly July–June, with the most records in August.
How common is North American Porcupine in Oregon?
It ranks #10 by number of iNaturalist observations among mammals in Oregon (2,552 records in our sample).