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Mammals of Thailand

Species of Thailand

Finlayson's squirrel

Binomial name: Callosciurus finlaysonii, Thomas Horsfield, 1823

Finlayson's squirrel or the variable squirrel (Callosciurus finlaysonii, sometimes misspelled C. finlaysoni) is a species of rodent in the family Sciuridae. It is found in Cambodia, Laos, Myanmar, Thailand, and Vietnam. The subspecies C. f. floweri, which is adapted to urban parks and gardens around Bangkok has been introduced in the Serangoon area of Singapore. There are also two introduced populations in Italy, probably a result of the species' popularity in the pet trade; both are thought to be of subspecies C. f. bocourti; it is possible that some of the Callosciurus squirrels introduced into Japan are also Finlayson's squirrels.

The pelage colour in this species is extremely variable; currently 16 subspecies are recognised, including C. f. ferrugineus which has been treated as a separate species. The subspecific name of C. f. boonsongi commemorates Thai zoologist and conservationist Dr. Boonsong Lekagul.

Like other squirrels of its genus (the "beautiful squirrels", Callosciurus), Finlayson's squirrel is normally a canopy-dweller, feeding mainly on fruit (Kitamura et al., (2002). Field evidence suggests that it has the usual form of dichromatic mammalian colour vision, which may enable it to discriminate ripe from unripe fruits (Tamura et al., 2015).

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Scientific classification

Callosciurus finlaysonii

Common names

  • English:
    • Finlayson's squirrel
    • Variable squirrel


  • Callosciurus finlaysonii albivexilli

  • Callosciurus finlaysonii annellatus

  • Callosciurus finlaysonii bocourti

  • Callosciurus finlaysonii boonsongi

  • Callosciurus finlaysonii cinnamomeus

  • Callosciurus finlaysonii ferrugineus

  • Callosciurus finlaysonii finlaysonii

  • Callosciurus finlaysonii folletti

  • Callosciurus finlaysonii frandseni

  • Callosciurus finlaysonii germaini

  • Callosciurus finlaysonii harmandi

  • Callosciurus finlaysonii menamicus

  • Callosciurus finlaysonii nox

  • Callosciurus finlaysonii sinistralis

  • Callosciurus finlaysonii trotteri

  • Callosciurus finlaysonii williamsoni

Conservation status

Least Concern (IUCN3.1)

Least Concern (IUCN3.1)

Finlayson's squirrel

Finlayson's squirrel

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Distribution map of Finlayson's squirrel, Callosciurus finlaysonii in Thailand

Range map of Callosciurus finlaysonii in Thailand

Important note; our range maps are based on limited data we have collected. The data is not necessarily accurate or complete.

Special thanks to Ton Smits, Parinya Pawangkhanant, Ian Dugdale and many others for their contribution for range data.

It is free to use this map on various media. See the creative common license terms by clicking "CC" icon below the map. But remember, again; the map may not be accurate or complete.

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