Lions are the only big cats whose males have a mane which makes them clearly distinguishable from females of the species. After birth, lion babies have a sand-coloured fur coat with dark, circular spots. They are well camouflaged in the savannah. Within the first four to six weeks, they remain in a den. At the age of three months, they are strong enough to follow their mother wherever she goes. Fun fact At the age of one year, young lions can roar.