Redbull Norns are a genetic breed based on the Wingies and have slightly shorter life spans which decrease the more they breed. Also, when they breed they gain Muscle Tissue. They also get lonely very quickly, which means they like to stay in groups. Their pregnancy is very short and their pigment genes tend to mutate quickly, even in a second generation creature. There are also some other minor changes for easier care. They require Chichi Wingies in Norn slot R to appear correctly.
Read more about their story here (down).