Common Squirrel Monkey

Saimiri sciureus

Also known as: South American Squirrel Monkey

LCLeast Concern

The common squirrel monkey is a small, quick South American primate that moves through the middle and lower levels of tropical forest. Large groups search for insects and fruit, using sharp calls to keep in contact. Dark skin around the muzzle and a pale face create its alert expression. Outside its native range, records may represent introduced colonies, escaped pets, or managed animals and need context.

US Range
Explore by state

Common Squirrel Monkey across 1 state

Occurrence records, conservation status, and the places it turns up, state by state. Open a state for detail, or visit its full page.

IUCN Red List status

  1. LC
  2. NT
  3. VU
  4. EN
  5. CR
  6. EW
  7. EX

LC – Least Concern

Widespread and abundant; not at risk.

Best encounter

Where and when to see a Common Squirrel Monkey

Your best chance: Florida.

Where
FloridaFL
Trophic relationshipsFood web What a Common Squirrel Monkey eats, and what eats it.
Eaten by

Few natural predators as an adult

This speciesCommon Squirrel Monkey
Possum GrapeCissus verticillataCommon GuavaPsidium guajava
Eats2

A sample of documented feeding relationships, filtered to species that also occur in the US. Diet and predators vary by region and season, and this is not a complete list, many animals eat, and are eaten by, more than what has been formally recorded here.

Life history

The Common Squirrel Monkey (0.6–1.1 kg1.2–2.4 lb) is an omnivore that first breeds around 2.7 years, carries a 161-day gestation, and bears about 1 young per litter. Maximum recorded longevity is 30.2 years.

Life cycle

  1. Gestation161 days (≈5.3 months)
  2. Birthlitter of 1 young
  3. Sexual maturity2.7 yr (female) · 5 yr (male)
  4. Typical lifespan30.2 years
  5. Maximum recorded longevity30.2 years

Reproduction

Gestation
161days≈5.3 months
Litter size
1youngaverage
Litters / year
1.07litters
Age at first breeding
2.7years♀ 2.7 · ♂ 5 yr

Diet composition

Omnivore

By foraging composition: 20% plant material, 20% seeds & grain, 20% fruit, 20% invertebrates, 20% vertebrates.

  • Plant material20%
  • Seeds & grain20%
  • Fruit20%
  • Invertebrates20%
  • Vertebrates20%

Most active during the day.

Typical values for the species, not local measurements. Maximum longevity is the longest lifespan on record; most individuals live far less.

Commonly confused with

Animals people sometimes mistake for the common squirrel monkey, and how to tell them apart.

Fast travel through branches

Long limbs, grasping hands, and a balancing tail help squirrel monkeys cross thin branches quickly. The tail isn’t used as an extra hand. Groups can contain many animals, but members spread out while feeding. Calls reconnect them when leaves hide nearby companions.

Insects, fruit, and seasonal choices

Insects provide important protein, while fruit supplies much of the remaining diet. The balance shifts as rainfall and fruiting seasons change. Monkeys inspect leaves, bark, and branch tips for small prey. Their busy search can cover several forest layers during one day.

Native and introduced records

The species belongs to northern South America, although its exact limits depend on recent monkey classifications. Populations reported elsewhere often began through human release or escape. Florida records don’t make the animal native there. Counts of observations also can’t reveal colony size without knowing whether repeated reports concern the same group.

Data & sources

The data and visualizations on this page draw on these open sources: