Based on 12,753 research-grade iNaturalist observations in Washington, Canada Goose is most often recorded in April; in Washington it behaves like a seasonal. It ranks #8 among birds recorded in the state in our data.
Branta canadensis
Canada Goose 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 April

Mallard

American Robin

Song Sparrow

American Crow

Dark-eyed Junco

Bald Eagle
Red-winged Blackbird

Great Blue Heron
Places to look in Washington
Gifford Pinchot National Forest
Olympic National Forest
Peace Arch Park
Colville National Forest
Mount Baker–Snoqualmie National Forest
Bellevue Botanical Garden
FAQ
When does Canada Goose appear in Washington?
Mainly March–July, with the most records in April.
How common is Canada Goose in Washington?
It ranks #8 by number of iNaturalist observations among birds in Washington (12,753 records in our sample).