Mallard drakes are one of the most colourful and commonly seen ducks in the northern hemisphere. When caught in the sunshine their brilliant green heads are almost iridescent. Mallard Facts: After the Mallard drakes abandon their mates to the job of raising the young, they fly to a secluded area and undergo their annual molt. The molting of their wing feathers leaves them temporarily flightless. They are no longer displaying their courtship plumage, but a drab "eclipse" plumage is similar to that of a female. It provides better camouflage against predators while their wing feathers grow back. The entire process takes 2 to 3 weeks. The hens go through a similar molt once their ducklings have fledged.