anybody seen this behavior before?

hi y’all, this morning, a young wild Muscovy Duck i’ve never seen before visited me for his morning meal, and was so friendly and trusting me caught me off guard. he came within centimeters of me and didn’t run away when i walked.

when i held my hand out for him to say hi, he began nibbling my fingers, hand, arm and Crocs. nothing vicious or anything like that, i’ve attached a video for context.

i’ve never experienced any behavior like this before, especially in wild Muscovy ducks. can anyone help me out here? any info much appreciated!