Based on 2,304 research-grade iNaturalist observations in Illinois, American White Pelican is most often recorded in April; in Illinois it behaves like a seasonal. It ranks #55 among birds recorded in the state in our data.
Pelecanus erythrorhynchos
American White Pelican in Illinois 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 Illinois in April

American Robin
Canada Goose
Red-winged Blackbird

Mallard

Northern Cardinal

House Sparrow

Brown-headed Cowbird

Common Grackle
Places to look in Illinois
Cahokia
Botanical GardenMorton Arboretum
Shawnee National Forest
Chicago Botanic Garden
Ladd Arboretum
State ParkStarved Rock State Park
FAQ
When does American White Pelican appear in Illinois?
Mainly March–May, with the most records in April.
How common is American White Pelican in Illinois?
It ranks #55 by number of iNaturalist observations among birds in Illinois (2,304 records in our sample).