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Britannica Sources used in this answer

How did the earth-coloured mouse reach northern Sumatra?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
Illustration of a house mouse, Mus musculus, showing a small, brownish-gray rodent with large ears, a pointed nose, and a long tail. A scale above indicates its length is about 10 centimeters or 4 inches.
mouse

The earth-coloured mouse (Mus terricolor) is native to peninsular India, Nepal, and Pakistan. While it is not native to Sumatra, it has been introduced into the northern part of the island.1