Based on 7,447 research-grade iNaturalist observations in Arizona, Lesser Goldfinch is most often recorded in April; in Arizona it behaves like a year-round resident. It ranks #10 among birds recorded in the state in our data.
Spinus psaltria
Lesser Goldfinch 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 April

Mourning Dove
Gambel's Quail
White-winged Dove
House Finch

Great-tailed Grackle

Curve-billed Thrasher

Gila Woodpecker

Vermilion Flycatcher
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 Lesser Goldfinch appear in Arizona?
Mainly November–September, with the most records in April.
How common is Lesser Goldfinch in Arizona?
It ranks #10 by number of iNaturalist observations among birds in Arizona (7,447 records in our sample).