How do you tell a male lion from a female?

Answer 1

Male lions, as adults, are bigger overall and have a big "collar" of long-haired fur on the top of their heads, around their throat, on part of their chest and partly down their back.

Answer 2

Male lions generally have a mane of hair around their neck, while females do not. Males are also larger in size and typically have a more muscular build compared to females. Additionally, male lions have a broader head and a thicker neck than female lions.