do you know what breed of mallard you have? i went to google and out in mallard beak color and came up with a few different sites. the one below show the different breeds and coloring. i hope this is helpful.

www.utm.edu/departments/ed/cece/ducks.shtml

Thanks it was very helpful.
I guess s/he is a full blooded mallard. Her mother looked like a full blooded mallard and I saw some male mallards and they looked a lot like regular mallards.