Parthenogenesis? Also, I believe Square said at one time or another that there ARE male Viera, they just stay hidden or something.
How do you know? Their masks cover their faces, and their clothes are almost the same color as their skin. Clothing is a big distinguisher between male and female. Maybe you wouldn't notice a slightly different outfit from the others that could possibly indicate femininity. Also, ALL Garif are extremely muscular, which gives them a masculine appearance, which could make spotting a female more dificult.And also Garifs are all male!
Actually, Rinok (the white Bangaa in Ba'Gamnan's crew) is female.Bangaa's seem male as well.
Yeah, the moogles are definitely harder to tell...This is all I know that is confirmed.and as for moogle's i can't distinguish male from female!
Male: Montblanc, Nono, Sorbet
Female: Gurdy, Pilika
I'm not sure about the others, though Horne (the red Moogling moogle) looks masculine IMO, and Hurdy (the blue Moogling moogle) looks feminine.