Gray spot on the wing

[fustaq]

it was there over two months on the two wings, What is the cause of it?

 

[zERo]

Welcome to the forums!

Unfortunately, it appears that your conure is plucking out his feathers, exposing the down underneath.

I’d recommend an avian vet visit with blood work to rule out any medical cause and if there’s no medical cause, start to address what could be causing him to pluck in his environment.