[Supperman]

Hi.

I can't tell the gender of a tiger, or a panther when I just look their face, because I'm not a zoologist. Yet I can tell which gender a lion is, because a male lion has XXX, while a female lion doesn't.

I think XXX is "mane", right?

BTW, how about "hair" or "long hair" instead of "mane"?
Is it OK for adults' communication?

I think it is OK for non-natives' communication.
How about native-English speaking adults' conversation?

Thank you.