Depending on the light the head of a male mallard can be an iridescent purple or a brilliant green.
I don't know if this is due to cross breeding or if it is a natural variation in colour. It could just be the physics of light refraction, I'm not sure.
If any one knows the reason please let me know.
If you look closely you will see the black tail curl.
These aren't the same bird but they were side by side.
Ducks are strong fliers; migrating flocks of Mallards have been estimated traveling at 55 miles per hour.The standard duck’s quack is the sound of a female Mallard. Males don’t quack; they make a quieter, rasping sound.