Based on 5,735 research-grade iNaturalist observations in Arizona, American Coot is most often recorded in March; in Arizona it behaves like a seasonal. It ranks #19 among birds recorded in the state in our data.
Fulica americana
American Coot in Arizona 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 Arizona in March

Mourning Dove
Gambel's Quail
House Finch

Vermilion Flycatcher

Gila Woodpecker

Curve-billed Thrasher
Anna's Hummingbird

Great-tailed Grackle
Places to look in Arizona
Desert Botanical Garden
Coronado National Forest
Boyce Thompson Arboretum
Tonto National Forest
Yuma Territorial Prison
Apache–Sitgreaves National Forests
FAQ
When does American Coot appear in Arizona?
Mainly October–May, with the most records in March.
How common is American Coot in Arizona?
It ranks #19 by number of iNaturalist observations among birds in Arizona (5,735 records in our sample).