Based on 3,130 research-grade iNaturalist observations in Arizona, Ring-necked Duck is most often recorded in January; in Arizona it behaves like a winter visitor. It ranks #45 among birds recorded in the state in our data.
Aythya collaris
Ring-necked Duck 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 January

Red-tailed Hawk
Anna's Hummingbird

Mourning Dove

White-crowned Sparrow

Gila Woodpecker
House Finch

Curve-billed Thrasher
American Coot
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 Ring-necked Duck appear in Arizona?
Mainly November–March, with the most records in January.
How common is Ring-necked Duck in Arizona?
It ranks #45 by number of iNaturalist observations among birds in Arizona (3,130 records in our sample).