Crest on the top of the head of some gallinaceous birds
A comb is a fleshy growth or crest on the top of the head of some gallinaceous birds, such as domestic chickens. The alternative name cockscomb (with several spelling variations) reflects the fact that combs are generally larger on cock birds than on hens. The comb is one of several fleshy protuberances on the heads of chickens, the others being the wattles and earlobes, which collectively are called caruncles.[citation needed] In turkeys, the caruncles are the fleshy nodules on the head and throat.
Chicken combs are most commonly red, but may also be black or dark purple in breeds such as the Silkie or the Sebright. In other species the color may vary from light grey to deep blue or red.[citation needed]
The comb may be a reliable indicator of health or vigor and is used for mate-assessment in some poultry species.[1]
Types of chicken comb
Comb shape varies considerably depending on the breed or species of bird. Of the many types and shapes seen in chicken cocks the principal ones are:[2]: 499 [3]
the single comb, extending in a single line from the top of the base of the beak to the back of the head. It consists of a solid vertical part with a series of points or serrations; the size, shape and number of these and the overall shape of the comb are all variable, depending on the breed.[2]: 502
the cup comb or buttercup comb, as seen in the Sicilian Buttercup, a cup-shaped comb with spiked edges.[2]: 500
the cushion comb, as seen in the Chantecler and Silkie, is a compact cushion-shaped mass covered with small protuberances, with a shallow transverse groove across it.[2]: 500
the horn comb or V-comb, as seen in breeds such as the Crèvecœur, La Flèche and Sultan, with two spikes in a V shape starting above the beak, tapering to a point from a thick base.[2]: 501
the leaf comb or shell comb, as seen in the Houdan, which resembles a butterfly with partially-opened wings.[2]: 501
the raspberry comb, as seen in the Orloff, which roughly resembles half a raspberry, cut lengthwise.[2]: 502
the rose comb, as seen in the Hamburg and Wyandotte, broad and fairly fast, covered with small pointed protuberances, with a long backwards-facing spike to the rear.
the strawberry or walnut comb, as seen in the Malay, which roughly resembles half a strawberry or walnut.[2]: 503
In hens, the comb is usually smaller and neater than in the cock.
There are three known genes affecting comb shape: Rose-Comb, Pea-Comb, and Duplex-Comb, which has one allele responsible for buttercup combs and another one responsible for V combs.[4]
In Italian cuisine, cockscombs are an ingredient of cibreo, a traditional sauce which also includes chicken livers, wattles and unlaid eggs.[5]: 88 It is used in the pasta dish tagliatelli al cibreo and in the main dish ciambella con cibreo.[5]: 468
Combs are prepared by parboiling and skinning, then cooking in court-bouillon. After preparation, they are greyish. They are often served in Chinese dim sum-style dishes.[citation needed]
Other
Because of its bright color and distinctive shape, "cockscomb" also describes various plants, including the florists' plant Celosia cristata, the meadow weed yellow rattle, sainfoin, wild poppy, lousewort, Erythronium and Erythrina crista-galli; the characteristic jester's cap; a shape of pasta (creste di galli); and so on. Hyaluronic acid, which is used in skincare and medical treatments to hydrate and maintain moisture in the skin, is extracted from cockscomb.[6][7]
Wikimedia Commons has media related to Cockscombs.
^Jones, E.K.M.; Prescott, N.B. (2000). "Visual cues used in the choice of mate by fowl and their potential importance for the breeder industry". World's Poultry Science Journal. 56 (2): 127–138. doi:10.1079/WPS20000010. S2CID 86481908.
^ a b c d e f g h iJ. Ian H. Allonby, Philippe B. Wilson (editors) (2018). British Poultry Standards: complete specifications and judging points of all standardized breeds and varieties of poultry as compiled by the specialist breed clubs and recognised by the Poultry Club of Great Britain, seventh edition. Chichester; Hoboken, New Jersey: Wiley Blackwell. ISBN 9781119509141.
^Dave Anderson ([n.d.]). The Chicken's Comb. Backyard Poultry. Archived 7 November 2013.
^Dorshorst, Ben; Harun-Or-Rashid, Mohammad; Bagherpoor, Alireza Jian; et al. (2015). "A Genomic Duplication is Associated with Ectopic Eomesodermin Expression in the Embryonic Chicken Comb and Two Duplex-comb Phenotypes". PLOS Genetics. 11 (3): e1004947. doi:10.1371/journal.pgen.1004947. hdl:10919/95024. PMID 25789773.
^ a bGiuliano Bugialli (1989). [https://archive.org/details/fineartofitalian00bugi_0/page/88/mode/1up The Fine Art of Italian Cooking, second edition. ISBN 0-8129-1838-X.
^Higgins, Maria (Mar 25, 2018). "Is Hyaluronic Acid Extracted from Animals?". Stanford Chemicals. Retrieved Aug 25, 2024.
^Liu, Long; Liu, Yanfeng; Li, Jianghua (2011). "Microbial production of hyaluronic acid: current state, challenges, and perspectives". Microb Cell fact. 10: 99. doi:10.1186/1475-2859-10-99. PMC 3239841. PMID 22088095.