Mallard ducks Anas platyrhynchos must be one of the most common ducks in the world. they manage to thrive in a great variety of climates, including the harsh northern winters of Norway.
when i googled 'mallard' the AI listed an odd question:
Can a female mallard turn into a male?
curiously clicking on that revealed:
Female ducks are born with two ovaries but only one develops. The left ovary actively pumps out hormones to stifle the male genes, making the bird truly female. If a disease damages the only ovary and it stops producing hormones the female duck spontaneously turns into a male
when i asked this drake if what my AI had informed me was correct, this was his reaction