The small capoo split from the roaming capoo. The small capoo looks like a smaller version of its ancestor, although there are some differences. The small capoo has become smaller than its ancestor because it's easier for walking through the mountains and it costs less energy. They are not as fast as their ancestors when they are on plain ground but this doesn't matter as there are no predators that hunt them. The membrane on their head and neck has grown much bigger and is now used for mating rituals in which both male and female try to attract each other by making it as red as possible. Their back tail has grown much smaller because it's less needed.