Based on 3,240 research-grade iNaturalist observations in Arizona, Round-tailed Ground Squirrel is most often recorded in May; in Arizona it behaves like a seasonal. It ranks #7 among mammals recorded in the state in our data.
Xerospermophilus tereticaudus
Round-tailed Ground Squirrel 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 May

Desert Cottontail
Rock Squirrel

Wapiti

Cliff Chipmunk

Collared Peccary
Coyote

Mule Deer

Arizona Gray Squirrel
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 Round-tailed Ground Squirrel appear in Arizona?
Mainly February–August, with the most records in May.
How common is Round-tailed Ground Squirrel in Arizona?
It ranks #7 by number of iNaturalist observations among mammals in Arizona (3,240 records in our sample).