Asiatic long-tailed climbing mouse

The Asiatic long-tailed climbing mouse ("Vandeleuria oleracea") is a species of rodent found in South and Southeast Asia. It is known as ගස් මීයා by Sinhalese people.
Description.
Head and body length is 7–9 cm. Tail is 10–12 cm. Reddish brown upperparts grading on the sides to light yellowish brown. Underparts are light brownish white. Long tail is dark, and slender with no tuft at tip. Largish hind feet with nails instead of claws on the outer toes, which are opposable.