2 Budgies, 3 Cockatiels, 6 GCC'S, 2 Crimson Bellie Conures, 9 Sun Conures, 2 Major Mitchells, 12 Eclectus parrots of various ages, 2 BF Amazons, 2 Hahn's Macaw's, 1 Red Tail Black Too
I think i would seek a Avian Vets opinion. But i would have to ask how long has this been going on. I do know they go through a hard molt but your bird looks like it's plucked out it's wing feathers.
If you are not feeding a balanced diet of fresh fruit & Veg & only feeding seed that could be the reason. But i am worried there is a more serious problem like a virus.
I agree with the vet recommendation, but can you post a pictures of the entire cage please?
Also, what size is his cage, how many toys are in it, how much time does your bird spend in his cage?
How about a little back ground on your bird, like how did you come by him, is he from a pet shop or privately owned, do you know what kind of care he received before you got him and how long have you had him?