My drake Opie [Muscovy] when he was getting close to 4-5 months old turned from this sweet lil cuddly duckling to this crazed drake who would fly up onto my back when I walked away from him or climb my leg and attack me I had other drakes but none had been raised specifically by me they had their mamas, so this was very new to me I came on here frantic to what was going on, was told about hormones and that it was best to kill him yep that person said that to me, Well Thankfully there were others who actually gave me things to do to train him and teach him that I was his flock leader not his girl, I was in love with this drake and heart broken to think I had made him that way because of being raised by me, There were other ducks here also but it was him and me for close to 12 weeks, I eventually went and got him 3 females same age and after some serious training he began to leave me alone and focused on them. I all this training tough love because you have to be determined to follow through with this or he'll never learn.
When he comes towards you like he is going after you put the broom between you and him to stop him in his tracks if he keeps coming after that take him and place one hand behind his head on his neck and the other at base of tail where tail and body meet. Lay him down flat on the ground belly down hold him till he stops fighting them let him go facing away from you if he comes again do it again .You not hurting him when holding him just enough pressure to keep him down. I would even come towards him and make him get out of my way by pushing him with the broom [not hitting him]
You have to be fast though you want to catch him off guard and your telling him you are flock leader not him. My drake is big so I place my knee on him to help hold him in place. I can even straddle him and squat over him and hold him down, what ever works and being over top is like a drake would be if he was putting him in his place.
This is not an over night training session it does take time, But Opie is now 6 yrs old and he is an awesome drake with me, oh sometimes he will get a little feisty with me but I let him know right away I am not going to put up with it and he learns quick.
I wish you the best as you start your training of your drake They make great pets once they know their place