Quick answer
Squirrels are agile tree-climbing rodents best known from the eastern gray squirrel, a familiar resident of woodlands, parks, and gardens across North America and much of Europe. They are mostly herbivorous, feeding on nuts, seeds, and fruit, and famously bury food caches to survive winter. Adults typically measure 23 to 30 cm (9 to 12 in) in body length plus a long bushy tail, and wild gray squirrels usually live around 6 years. Squirrels as a family live nearly worldwide.
Key takeaway
Squirrels are agile tree-climbing rodents best known from the eastern gray squirrel, a familiar resident of woodlands, parks, and gardens across North America and much of Europe. They are mostly herbivorous, feeding on nuts, seeds, and fruit, and famously bury food caches to survive winter. Adults typically measure 23 to 30 cm (9 to 12 in) in body length plus a long bushy tail, and wild gray squirrels usually live around 6 years. Squirrels as a family live nearly worldwide.
Overview
Squirrels are agile tree-climbing rodents best known from the eastern gray squirrel, a familiar resident of woodlands, parks, and gardens across North America and much of Europe. They are mostly herbivorous, feeding on nuts, seeds, and fruit, and famously bury food caches to survive winter. Adults typically measure 23 to 30 cm (9 to 12 in) in body length plus a long bushy tail, and wild gray squirrels usually live around 6 years. Squirrels as a family live nearly worldwide.
Biology
Squirrel (Sciurus carolinensis) is classified as Mammal with conservation status Least Concern. Typical weight 400–700 g (0.9–1.5 lb); lifespan around About 6 years in the wild.
Ecology
Diet: Omnivore (mostly nuts, seeds, fruit). Habitat: Woodlands, parks, and gardens. Movement and social systems reflect those pressures.
People and this species
Learn before you travel or keep related pets. Wild individuals are not toys; captive care needs species-specific husbandry.
Further reading
See the full Squirrel profile for FAQs, taxonomy, and related guides on this site.
Behavior and agility
Squirrels are remarkably acrobatic, leaping between branches and running headfirst down tree trunks thanks to ankle joints that rotate to grip bark. Their long, bushy tails aid balance, act as a rudder during jumps, and serve as a blanket in cold weather. They are active by day and stay alert for predators, flicking their tails and giving sharp calls when alarmed. Gray squirrels build leafy nests called dreys high in trees.
Diet and food caching
Squirrels are mostly herbivorous, eating nuts, seeds, acorns, fruit, buds, and fungi, and occasionally insects or eggs. They are famous for caching food, burying thousands of nuts each autumn to eat through winter. Many of these buried seeds are never recovered and grow into new trees, making squirrels important seed dispersers. They use spatial memory and smell to relocate their hidden stores.
Habitat and range
The eastern gray squirrel is native to eastern North America but has been introduced widely in Britain, Ireland, and parts of continental Europe, where it often outcompetes native red squirrels. Squirrels as a family live on nearly every continent except Antarctica and Australia. Gray squirrels thrive in deciduous and mixed forests and have adapted well to city parks and suburban gardens. They do not hibernate and remain active year-round.
Reproduction and life cycle
Female gray squirrels usually have one or two litters a year, each with two to four young born blind and hairless in a tree nest. The young are weaned at around 10 weeks and become independent soon after. Most squirrels die young, but those that survive their first year may live around six years in the wild. Predators include hawks, owls, foxes, and domestic cats.
Research notes
Figures for squirrels (Sciurus carolinensis) come from field studies, museum records, and conservation assessments that do not always agree on exact averages. Prefer ranges over single-point claims, and check whether a source describes wild, captive, or mixed populations.
Practical takeaways
If you encounter squirrels in the wild, prioritise distance and local guidance. If you care for related domestic or captive animals, match diet and housing to species needs rather than generic pet advice. Share accurate status information (Least Concern) when discussing conservation.
Sources
FAQs
Squirrel: Key Facts & Natural History?
Squirrels are agile tree-climbing rodents best known from the eastern gray squirrel, a familiar resident of woodlands, parks, and gardens across North America and much of Europe. They are mostly herbivorous, feeding on nuts, seeds, and fruit, and famously bury food caches to survive winter. Adults typically measure 23 to 30 cm (9 to 12 in) in body length plus a long bushy tail, and wild gray squirrels usually live around 6 years. Squirrels as a family live nearly worldwide.
What is the scientific name of the squirrel?
Sciurus carolinensis
What do squirrels eat?
Omnivore (mostly nuts, seeds, fruit)
Where do squirrels live?
Woodlands, parks, and gardens
Are squirrels endangered?
Listed here as Least Concern. Check IUCN and national lists for the latest assessment.