Size Differences
Heavy, medium and light breeds and varieties are recognized by American Poultry Association and organized by weight. Bantam breeds are recognized by both APA and American Bantam Association, although not every breed and variety is recognized by both groups. Each organization has a written standard describing the ones they recognize.
Bantam Breeds and varieties (colors)
call: Gray, White, Blue, Snowy, Buff, Pastel, Butterscotch, Chocolate, Black, Khaki, Black & White Magpie, Blue Fawn east indie: Black mallard: Snowy, Gray
light Breeds and varieties
campbell: Khaki
magpie: Black & White, Blue & White
runner: Fawn & White, White, Penciled, Black, Buff, Chocolate, Cumberland Blue, Gray
Welsh harlequin
medium Breeds and varieties
Buff cayuga: Black crested: White, Black swedish: Blue
heavy Breeds and varieties
aylesbury: White
muscovy: White, Black, Blue, Chocolate
Pekin: White
rouen saxony silver appleyard