He is 13 months old. In the past week, feathers are just falling out of him. He leaves a trail like grettel everywhere he goes.

I dont even want to talk about the bottom of his cage. Alot there. He is preening more than usual but I havent seen him pluck, thats is my worst fear. He is always too busy causing me problems to pluck so I need to get that out of my head.
Off track a bit but he has also started doing his nails, amen. To the point a dont feel a trim will be needed any longer. They have always been trimmed short and he prefers that so they dont get caught up in fabric. Smart fid.
Anyway, back to his feathers:
Isnt 13 months off target for a moult?
Do they shed in the summer?
If this is indeed a moult, will it be his adult moult (ring or no ring). In the past two weeks he has developed a black ring underneath his neck. Ring is a strong word but it it obvious the ring that was once all lime is now turned dark under his neck.
Help me feel better. Isnt black ok? Meaning a ring might come and nothing else?