Based on 3,486 research-grade iNaturalist observations in Idaho, Canada Goose is most often recorded in April; in Idaho it behaves like a seasonal. It ranks #2 among birds recorded in the state in our data.
Branta canadensis
Canada Goose in Idaho 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 Idaho in April

Mallard
Red-winged Blackbird

American Robin

Red-tailed Hawk

Osprey

Great Blue Heron
American Coot
Swainson's Hawk
Places to look in Idaho
National ForestBoise National Forest
Caribou–Targhee National Forest
Sawtooth National Forest
City of Rocks National Reserve
State ParkMassacre Rocks State Park
National ForestKaniksu National Forest
FAQ
When does Canada Goose appear in Idaho?
Mainly February–May, with the most records in April.
How common is Canada Goose in Idaho?
It ranks #2 by number of iNaturalist observations among birds in Idaho (3,486 records in our sample).