Franklin's Ground Squirrel

Fascinating facts about the Franklin's Ground Squirrel

• A Franklin's ground squirrel vanishes underground for 8 months every year — longer than any other ground squirrel in North America. They enter a state called torpor in late July, before summer even ends, and don't emerge until April. Their body temperature plummets to just above freezing, their heart rate drops from 200 beats per minute to fewer than 10, and they survive on fat reserves alone. This extreme timing is a bet: they're betting the prairie will provide food when they wake, and if spring arrives late, that bet can cost them their lives.
• Franklin's ground squirrels are the only ground squirrels in North America with stripes on their cheeks and shoulders — a pattern that makes them look like they're wearing a vest. Most ground squirrels in their range are either fully spotted or fully plain. Scientists think the stripes help them signal alarm faster to family members living in the same burrow colony, where split-second warnings mean the difference between escaping a predator and becoming lunch.
• A single Franklin's ground squirrel can dig a burrow system with over 15 separate entrances, each one disguised as a simple hole in the grass. They engineer these tunnels with special chambers: one for nesting, one for food storage, one for waste. Underground, they spend nearly as much time as they do above ground, yet we know less about their subterranean life than we do about creatures that live in the Arctic.
• Franklin's ground squirrels have been vanishing from the southern edge of their range for the past 40 years, with populations in Missouri and Illinois now gone or nearly gone. Climate change is shifting prairie seasons in ways that no longer align with their buried hibernation schedule — they wake up to frost and bare ground instead of fresh sprouts. Their 8-month sleep, once a survival masterpiece, is becoming a fatal timing mismatch.
• A Franklin's ground squirrel's social calls include a 'chatter' so sharp and rapid it sounds like a tiny drill, used to warn siblings of hawks, and a softer 'chirp' that signals all-clear. These calls are inherited — young squirrels learn the family dialect from their mothers — and different colonies have measurably different warning calls. They're teaching their young a language of survival specific to their patch of prairie.

At a glance

About the Franklin's Ground Squirrel

In the sun-drenched prairies of North America, the Franklin's Ground Squirrel darts through the tapestry of wildflowers with an air of unbridled joy, its rust-hued fur glistening like burnished copper as it weaves between the tall grasses. With an irrepressible spark in its bright, inquisitive eyes, this diminutive creature embodies the very essence of its landscape, its nimble form a perfect reflection of the unfettered freedom that defines its windswept world. As it burrows into the earth with a soft, scratching intensity, the Franklin's Ground Squirrel reveals itself to be a master of its underground realm, a secretive and resourceful inhabitant of the hidden places that lie just beneath our feet.

Discover more wildlife