All fowl have a crest on their head. It consists of a flap of skin and is particularly large and noticeable on roosters. The serrated comb, which looks like a blazing fire, is the best known. In addition, there are butterfly, rose and pea-shaped combs. Fun fact: If the comb has a strong red color, this indicates that the rooster is healthy. Dimensions: 1.1 x 2.4 x 2.6 inch (W x D x H).