Treeshrew
The treeshrews (or tree shrews) are small mammals native to the tropical forests of Southeast Asia. They make up the families Tupaiidae and Ptilocercidae and the entire order Scandentia. There are 20 species in 5 genera. Treeshrews have a higher brain to body mass ratio than humans, though this is not uncommon for animals weighing less than a kilogram.
Although called treeshrews, they are not true shrews (although they were previously classified in the Insectivora), and are not all arboreal.  Among other things, they eat Rafflesia fruit. They have no clear fossil record.

# Characteristics
Treeshrews are slender animals with long tails and soft, greyish to reddish-brown fur. The terrestrial species tend to be larger than the arboreal forms, and to have larger claws, which they use for digging up insect prey. They are omnivorous, feeding on insects, small vertebrates, fruit, and seeds. They have poorly developed canine teeth and unspecialised molars, with an overall dental formula of:Template:Dentition2
Treeshrews have good vision, which is binocular in the case of the more arboreal species. Most are diurnal, although the Pen-tailed Treeshrew is nocturnal.
Female treeshrews give birth to up to three young after a gestation period of 45-50 days, in nests lined with dry leaves inside tree hollows. The young are born blind and hairless, but are able to leave the nest after about a month. During this period, the mother provides relatively little maternal care, visiting her young only for a few minutes every other day to suckle them. Treeshrews reach sexual maturity after around four months, and breed for much of the year, with no clear breeding season in most species.
These animals live in small family groups, which defend their territory from intruders. They mark their territories using various scent glands, or urine, depending on the particular species.
The name Tupaia is derived from tupai the Malay word for squirrel and was provided by Sir Stamford Raffles.

# Classification
Treeshrews were moved from Insectivora to the Primates order, because of certain internal similarities to the latter (for example, similarities in the brain anatomy, highlighted by Sir Wilfred Le Gros Clark), and classified as a primitive prosimian. However, recent molecular phylogenetic studies have strongly suggested that treeshrews should be given the same rank (order) as the primates and, with the primates and the flying lemurs, belong to the clade Euarchonta. According to this classification, the Euarchonta are sister to the Glires (lagomorphs and rodents), and the two groups are combined into the clade Euarchontoglires. Other arrangements of these orders have been proposed.
- ORDER SCANDENTIA
Family Tupaiidae
Genus Anathana
Madras Treeshrew, Anathana ellioti
Genus Dendrogale
Bornean Smooth-tailed Treeshrew, Dendrogale melanura
Northern Smooth-tailed Treeshrew, Dendrogale murina
Genus Tupaia
Northern Treeshrew, Tupaia belangeri
Golden-bellied Treeshrew, Tupaia chrysogaster
Striped Treeshrew, Tupaia dorsalis
Common Treeshrew, Tupaia glis
Slender Treeshrew, Tupaia gracilis
Horsfield's Treeshrew, Tupaia javanica
Long-footed Treeshrew, Tupaia longipes
Pygmy Treeshrew, Tupaia minor
Calamian Treeshrew, Tupaia moellendorffi
Mountain Treeshrew, Tupaia montana
Nicobar Treeshrew, Tupaia nicobarica
Palawan Treeshrew, Tupaia palawanensis
Painted Treeshrew, Tupaia picta
Ruddy Treeshrew, Tupaia splendidula
Large Treeshrew, Tupaia tana
Genus Urogale
Mindanao Treeshrew, Urogale evereti
Family Ptilocercidae
Genus Ptilocercus
Pen-tailed Treeshrew, Ptilocercus lowii
- Family Tupaiidae
Genus Anathana
Madras Treeshrew, Anathana ellioti
Genus Dendrogale
Bornean Smooth-tailed Treeshrew, Dendrogale melanura
Northern Smooth-tailed Treeshrew, Dendrogale murina
Genus Tupaia
Northern Treeshrew, Tupaia belangeri
Golden-bellied Treeshrew, Tupaia chrysogaster
Striped Treeshrew, Tupaia dorsalis
Common Treeshrew, Tupaia glis
Slender Treeshrew, Tupaia gracilis
Horsfield's Treeshrew, Tupaia javanica
Long-footed Treeshrew, Tupaia longipes
Pygmy Treeshrew, Tupaia minor
Calamian Treeshrew, Tupaia moellendorffi
Mountain Treeshrew, Tupaia montana
Nicobar Treeshrew, Tupaia nicobarica
Palawan Treeshrew, Tupaia palawanensis
Painted Treeshrew, Tupaia picta
Ruddy Treeshrew, Tupaia splendidula
Large Treeshrew, Tupaia tana
Genus Urogale
Mindanao Treeshrew, Urogale evereti
- Genus Anathana
Madras Treeshrew, Anathana ellioti
- Madras Treeshrew, Anathana ellioti
- Genus Dendrogale
Bornean Smooth-tailed Treeshrew, Dendrogale melanura
Northern Smooth-tailed Treeshrew, Dendrogale murina
- Bornean Smooth-tailed Treeshrew, Dendrogale melanura
- Northern Smooth-tailed Treeshrew, Dendrogale murina
- Genus Tupaia
Northern Treeshrew, Tupaia belangeri
Golden-bellied Treeshrew, Tupaia chrysogaster
Striped Treeshrew, Tupaia dorsalis
Common Treeshrew, Tupaia glis
Slender Treeshrew, Tupaia gracilis
Horsfield's Treeshrew, Tupaia javanica
Long-footed Treeshrew, Tupaia longipes
Pygmy Treeshrew, Tupaia minor
Calamian Treeshrew, Tupaia moellendorffi
Mountain Treeshrew, Tupaia montana
Nicobar Treeshrew, Tupaia nicobarica
Palawan Treeshrew, Tupaia palawanensis
Painted Treeshrew, Tupaia picta
Ruddy Treeshrew, Tupaia splendidula
Large Treeshrew, Tupaia tana
- Northern Treeshrew, Tupaia belangeri
- Golden-bellied Treeshrew, Tupaia chrysogaster
- Striped Treeshrew, Tupaia dorsalis
- Common Treeshrew, Tupaia glis
- Slender Treeshrew, Tupaia gracilis
- Horsfield's Treeshrew, Tupaia javanica
- Long-footed Treeshrew, Tupaia longipes
- Pygmy Treeshrew, Tupaia minor
- Calamian Treeshrew, Tupaia moellendorffi
- Mountain Treeshrew, Tupaia montana
- Nicobar Treeshrew, Tupaia nicobarica
- Palawan Treeshrew, Tupaia palawanensis
- Painted Treeshrew, Tupaia picta
- Ruddy Treeshrew, Tupaia splendidula
- Large Treeshrew, Tupaia tana
- Genus Urogale
Mindanao Treeshrew, Urogale evereti
- Mindanao Treeshrew, Urogale evereti
- Family Ptilocercidae
Genus Ptilocercus
Pen-tailed Treeshrew, Ptilocercus lowii
- Genus Ptilocercus
Pen-tailed Treeshrew, Ptilocercus lowii
- Pen-tailed Treeshrew, Ptilocercus lowii