Based on 2,542 research-grade iNaturalist observations in Washington, North American River Otter is most often recorded in August; in Washington it behaves like a year-round resident. It ranks #11 among mammals recorded in the state in our data.
Lontra canadensis
North American River Otter in Washington 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 Washington in August
Hoary Marmot
Cascade Golden-mantled Ground Squirrel
Douglas's Squirrel
American Pika
Eastern Cottontail
Eastern Gray Squirrel
Mountain Goat
American Black Bear
Places to look in Washington
National ForestGifford Pinchot National Forest
National ForestOlympic National Forest
State ParkPeace Arch Park
National ForestColville National Forest
National ForestMount Baker–Snoqualmie National Forest
Botanical GardenBellevue Botanical Garden
FAQ
When does North American River Otter appear in Washington?
Mainly July–June, with the most records in August.
How common is North American River Otter in Washington?
It ranks #11 by number of iNaturalist observations among mammals in Washington (2,542 records in our sample).