The bold and beautiful

I saw these odd-colored Mallards (Anas platyrhynchos) yesterday at Hatanpää Arboretum in Tampere. The male in photo tried first to mate with normal female Mallard, but the female did not accept this guy. Finally the male gave up, flew back to an other pond where it met this black female Mallard. She was totally different compared to her normal colored sister and she accepted the male immediately and soon they looked like a happy just married couple.