Bearded Emperor Tamarin

In order to adapt to his new desert habitat, the Bearded Emperor Tamarin hair had evolved to become orange in order to camouflage better with its desert environment. It had also grown bigger ears, as it would help it cool down in the hot environment, Its mustache is and always has been perfect. Which is why it hasn't changed. Internally, its stomach has inflated for more water storage. Making it slightly bigger than the average squirrel. In order to avoid sunlight, sand or debris from getting in its eye it had grown bigger eyebrows.