Utah Fox Squirrels

NHMU is studying Fox Squirrels, and we need your help!

The fox squirrel (Sciurus niger), a species native to the eastern US, has recently become established in Utah. First reported in 2011 along the Jordan River in Salt Lake City, this tree squirrel has been spreading throughout northern Utah. The arrival of fox squirrels offers an opportunity to study, first-hand, the ecology of an introduced species, and you can help!

Information you submit to our form will help NHMU scientists:

• Explore the distribution of Fox Squirrels (where they are present, or not present)
• Understand how are they interacting with their environment (e.g., What do they eat? When are they active? What species do they interact with?)

Our survey is open year-round. Click above to access the online survey form, and explore our data map.

Tips for identifying Fox Squirrels

• Adults are large compared to Utah's native tree squirrels, ranging from 18 to 28 inches in total length (including the tail).
• Have grizzled gray-and-orange backs and undersides that range from pale yellow to bright orange.
• Tails are very bushy, bright orange, and very long (very fox-like!) – almost as long as their body.
• Highly adapted to living in trees, and travelling along power lines and fences. When startled, they will escape by climbing.
• Fox Squirrel Vocalizations

Utah's native squirrels

Not sure if you saw is a fox squirrel? Here two native squirrels you are likely to see in northern Utah for comparison.

American Red squirrel (Tamiasciurus hudsonicus)

• Smaller than fox squirrels, about 12-16 inches long including their tails.
• Have dark, reddish-brown backs and a pale, creamy underside.
• Tails are not as bushy as a fox squirrel's.
• Common around conifer trees in parks, but also travel along telephone lines.
• Red Squirrel Chatter

Rock squirrel (Otospermophilus variegatus)

• About the same size as a fox squirrel.
• Grizzled gray backs with yellow and brown highlights. Their underside is pale.
• Long tail, but it is only slightly bushy.
• Spend most of their time on the ground and run rather than bound.
• When startled, they will retreat to a burrow or rock plie rather than climb.
• Rock Squirrel vocalizations

Read our Fox Squirrel FAQ's here

More fun ways to explore and learn:

If you have questions about the Utah Fox Squirrels project, please contact NHMU Citizen Science Manager, Ellen Eiriksson.