Frog question

[Ambilobe123]

So in the spring,I usually collect a couple of the local wood frogs left to die after their last year of breeding. This guy has been with me since last spring, with no other health issues.
Recently he started arching his hips way over his back, which was odd, but he seemed otherwise fine, and was still eating.

Yesterday I noticed this happening, and separated him from the other frog I have (in a 45 gal long paludarium).

He’s now in a quarantine/observation bucket, but does anyone have any idea why he’s losing the pigment in his skin? It appeared almost overnight, what could it be?

 

[kinyonga]

Does he make any sounds while doing this?
Do you know it's a male for sure?

 

[Ambilobe123]

Does he make any sounds while doing this?
Do you know it's a male for sure?

No sounds, and suspected male. I have a female with him who is currently developing eggs, I kind of assumed he would be doing so too if he were female.

 

[Ambilobe123]

Bump

 

[kinyonga]

Could it be part of a courtship action?

 

[Ambilobe123]

Could it be part of a courtship action?

Possibly, but that wouldn’t explain the pigment loss. As well, their courtship is REALLY loud, and I haven’t heard a peep from any of them since last spring.