My husband found a duckling in our backyard we decided to keep it. From what we researched we figured out it was a mallard. The problem is we don't know if it is a male or female it's still growing. We see blue feathers coming out like the females but it also has greenish on its top of its head. If anyone could help that would be awesome. We love it and we did we want to get another one so it won't be lonely.