Materials:
Tan/brown yarn - worsted weight
Red yarn - worsted weight
Black yarn - worsted weight
5mm hook
Scissors
Darning Needle
Polyfil
Weights (river rocks, aquarium rocks, polypellets) - optional
Pantyhose/Shoe Store Footies - if using weights to make it weighted, this helps keep the weight pieces from slipping through the stitches.

Note: I used acrylic yarn, but you are free to use whatever yarn you want. Please know that whatever yarn and hook size you use will change the size of the duck.