I actually had a paper w/ terms on it, and here's a few common words it had:

Barred - having alternate bands of different color on a bird's feathers, usually black and white.

Bean - a raised, hard, bean-shaped swelling on the end of a bill on a waterfowl.

Blade - the portion of a single comb below the points

Cushion - the feathers on a female chicken's back, called a saddle on a male chicken.

Dual-purpose - Chickens used for both egg and meat production

Mottled - an arrangement of colored spots or blotches

Snood - tube-like fleshy growth near the front of the top of the head in turkeys