Nouse

The nouse replaced its ancestor. Due to the increasing number of predators, the nouse had to become smaller than its ancestor; in fact it is approximately the size of a mouse. Its many other changes include the loss of its wings since it doesn't need them anymore, a slightly longer tail, and bigger eyes that help it see in the night. It also has a slightly stronger immune system, slightly more intelligence, and it produces lots of babies.

However, the most unique evolution is that the nouse can feel happiness.