Based on 928 research-grade iNaturalist observations in Idaho, Western Tiger Swallowtail is most often recorded in June; in Idaho it behaves like a summer visitor / breeder. It ranks #2 among butterflies recorded in the state in our data.
Papilio rutulus
Western Tiger Swallowtail 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 June
Lorquin's Admiral
Pale Swallowtail
Common Ringlet
California Tortoiseshell
Boisduval's Blue
Small White
Two-tailed Swallowtail
Northern Crescent
Places to look in Idaho
National ForestBoise National Forest
National ForestCaribou–Targhee National Forest
National ForestSawtooth National Forest
State ParkCity of Rocks National Reserve
State ParkMassacre Rocks State Park
National ForestKaniksu National Forest
FAQ
When does Western Tiger Swallowtail appear in Idaho?
Mainly June–July, with the most records in June.
How common is Western Tiger Swallowtail in Idaho?
It ranks #2 by number of iNaturalist observations among butterflies in Idaho (928 records in our sample).