I know the one brown one was a chicken egg I know that mallards in yge wild lay brownish white eggs so the blend in and know I know farm raised mallards lay green eggs
I hope rouen is female the one molting that is the male is my brother zachs and he is 1 year and 5 months old and the other two are mine the only one that is 2 months is the little rouen not the khaki Campbell
all I know is that a male duck will keep the hen safe from anything even the chickens it was born with just natural duck behavior cause my duck which I found out was a rouen protects my khaki Campbell female from my chickens cause he is protecting his female