i also read an article about the vent being orange on the females! me and a friend looked at 14 l134's and none had orange vents, so i cud not relate to this post! (there was deftnly females in the 14, as they have spawned)
here are 6 of my 7, some have paterns on the underneath! i belive this to b down to individuals, and not related to the sexing!
sorry about the speeling.. its late

i understand it wil b dificult to tell from just a photo, but if any1 knows there frogs and can help! it wil b very helpfull!