Lion (Roaring)Schleich 14726 Lion (Roaring). Lions are the only big cats whose males have a mane which makes them clearly distinguishable from females of the species. Fun Fact: It takes five years for the mane of a male lion to grow fully. The larger the mane of a lion, the more frightening it is for intruders of its territory, which it defends. Lions are the only ones who hunt together in prides although this task is usually left to the lionesses. Since they are