Nouse

The Nouse replaced its ancestor. This is 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, bigger eyes that help it see in the night. It also has a slightly stronger immune system, slightly more intelligent, and it produces lots of babies.

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