Hello everyone,
I think I might have found a way to tell the sex of Congo African Greys, I have noticed that the females not only have the rounded head like we all know, and the males heads are kinda squared... but the females don't have white at the tips of their wing feathers, where the males do! Please see picture below.
Both these birds are DNA sexed, and I wanted to take a poll of other birds here that are either DNA'd or proven, to see if this in fact is a way of sexing our birds. I'm not sure if this happens at a certain age, but from what I can tell from your pictures and my friends birds, this is a fact!
Tell me if this works for your DNA'd bird.