White-Lipped breeding season/male "pink breeding stripe"

[Gaemm]

I've read that White-Lipped Tree Frog males can get a flushed pink look to the leg stripe once it comes to breeding season. I'm still not 100% sure if mine is male or female, so does anyone have any idea as to when breeding season is? Or can I imitate the season by raising the temperature a few degrees in order to find out?

Does anyone have any photo evidence of the "breeding stripe" as well?

Thanks