TREE SQUIRRELS · SPECIES PROFILE

Finlayson’s Squirrel

Callosciurus finlaysonii

Least Concern
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Body length20–25 cm (8–10 in)
Tail length20–25 cm (8–10 in)
Weight~300–400 g
Fur colorHighly variable; black, white, brown, or mixed patterns
Breeding seasonUnknown
Gestation~40–45 days
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Classification

KingdomAnimalia
PhylumChordata
ClassMammalia
OrderRodentia
FamilySciuridae
GenusCallosciurus
SpeciesCallosciurus finlaysonii
NATIVE RANGE

Where it is found

Finlayson’s Squirrel is native to Southeast Asia.

Its natural range includes:

The species has also been introduced to several other regions, including:

These introduced populations have established themselves in some urban and park environments.

Thailand
Cambodia
Laos
Vietnam
Myanmar
Italy
Japan
Singapore
HABITAT

Where it lives

Finlayson’s Squirrels inhabit a variety of forested and semi-urban environments.

Typical habitats include:

They are highly adaptable and can thrive in human-modified environments with tree cover.

Tropical forests
Secondary forests
Woodland areas
Agricultural landscapes
Urban parks and gardens
RANGE & HABITAT CONTEXT

Compare form, setting and structure

Related tree squirrels help break up the reference while showing how habitat, body form and movement can vary across the broader group.

Palawan Montane Squirrel — related tree squirrel visual context
RELATED TREE SQUIRRELPalawan Montane SquirrelSundasciurus rabori — related group reference for visual comparison; not Finlayson’s Squirrel.(c) Adrian Constantino, some rights reserved (CC BY-NC) · CC-BY-NC · VIEW SOURCE ↗
Robinson’s Squirrel — related tree squirrel visual context
RELATED TREE SQUIRRELRobinson’s SquirrelSundasciurus robinsoni — related group reference for visual comparison; not Finlayson’s Squirrel.(c) Mok Zhuang Yu, some rights reserved (CC BY) · CC-BY · VIEW SOURCE ↗
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Nest & Shelter

Finlayson’s Squirrels build nests known as dreys in trees.

Typical nest characteristics include:

They may also use tree cavities or abandoned bird nests as shelter.

Constructed from twigs, leaves, grass, and bark fibers
Located in tree forks or dense branches
Positioned within the canopy of trees
Used for resting and raising young
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Physical Profile

Body length20–25 cm (8–10 in)
Tail length20–25 cm (8–10 in)
Weight~300–400 g
Fur colorHighly variable; black, white, brown, or mixed patterns
BellyOften pale or contrasting
Distinct featureExtreme variation in coat color
TailLong and bushy

Finlayson’s Squirrel is known for its remarkable color variation, with individuals displaying many different coat patterns.

BEHAVIOR & FORAGING CONTEXT

Keep behavior connected to the animal

These are related tree squirrels, not photographs of Finlayson’s Squirrel. Use them as visual context for locomotion, posture, feeding and environmental use.

Samar Squirrel — related tree squirrel visual context
RELATED TREE SQUIRRELSamar SquirrelSundasciurus samarensis — related group reference for visual comparison; not Finlayson’s Squirrel.(c) stefanie_de_win, some rights reserved (CC BY-NC) · CC-BY-NC · VIEW SOURCE ↗
Southern Palawan Tree Squirrel — related tree squirrel visual context
RELATED TREE SQUIRRELSouthern Palawan Tree SquirrelSundasciurus steerii — related group reference for visual comparison; not Finlayson’s Squirrel.(c) kurtcabahug, some rights reserved (CC BY-NC) · CC-BY-NC · VIEW SOURCE ↗
BEHAVIOR

How it behaves

Finlayson’s Squirrels are diurnal and arboreal.

Typical behaviors include:

They are energetic and highly adaptable climbers.

Moving quickly through tree canopies
Foraging across trees and the ground
Living solitary or in small family groups
Producing vocal alarm calls
DIET

What it eats

Finlayson’s Squirrels are omnivorous.

Common foods include:

Their feeding behavior contributes to seed dispersal in forest ecosystems.

Fruits
Seeds
Nuts
Tree bark
Flower buds
Insects
Bird eggs
GROUP DIVERSITY

See the wider group around this species

Squirrels in the same broad group can look and live very differently. These credited references provide comparison without changing the facts for Finlayson’s Squirrel.

Malayan Mountain Squirrel — related tree squirrel visual context
RELATED TREE SQUIRRELMalayan Mountain SquirrelSundasciurus tahan — related group reference for visual comparison; not Finlayson’s Squirrel.(c) Wich’yanan (Jay) Limparungpatthanakij, some rights reserved (CC BY-NC) · CC-BY-NC · VIEW SOURCE ↗
Lowland Slender Squirrel — related tree squirrel visual context
RELATED TREE SQUIRRELLowland Slender SquirrelSundasciurus tenuis — related group reference for visual comparison; not Finlayson’s Squirrel.(c) Soh Kam Yung, some rights reserved (CC BY-NC) · CC-BY-NC · VIEW SOURCE ↗
REPRODUCTION

Breeding & Young

Breeding seasonUnknown
Gestation~40–45 days
Litter size2–4 young

Young squirrels are raised in tree nests built from leaves and twigs.

LIFESPAN

Longevity

Unknown

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Conservation

STATUS Least Concern

IUCN Status: Least Concern

Finlayson’s Squirrel has a large range and stable population. In some introduced areas, it is even considered invasive.