white peahen with rust color

[Faisal12]

I purchased this peahen last year as white, but I observed a rust color and frizzy feathers. Initially, I assumed she was simply dirty. However, even after 14 months, her feathers remain rusty and frizzy. According to my estimation, this peahen should be around 2.5 years old.

Has anyone encountered a similar case? What could be the cause of this?

 

[Midnightman14]

algae

 

[Faisal12]

@Midnightman14 Thanks for your reply!
any suggestions to treat her?

 

[Midnightman14]

@Midnightman14 Thanks for your reply!
any suggestions to treat her?

It doesn't hurt anything, it just happens when it's humid during summer.