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Sex-links〔(The Making of Sex-Links - FeatherSite Barry Koffler )〕 are cross-bred chickens whose color at hatching is differentiated by sex, thus making chick sexing an easier process. Sex-links come in many varieties, few of which are a true breed. As hybrids of laying or dual-purpose breeds infused with extra vigor via heterosis, sex-links can be extremely good egg-layers which often produce 300 eggs a year or more depending on the quality of care and feed. The color of their eggs vary according to the mix of breeds, and blue-green eggs are possible. Many common varieties are known as the black sex-link (also called Black Stars) and the red sex-link (also called Red Stars).〔(Sex-Links - FeatherSite Barry Koffler )〕 More specific variety names are common as well. Blacks are a cross between a Rhode Island Red or New Hampshire rooster and a Barred Rock hen. Red sex-links are a cross between a Rhode Island Red or New Hampshire rooster and a White Rock (This variety pair is known as a Golden Comet), Silver Laced Wyandotte, Rhode Island White or Delaware hen. One example of a red linked breed is the Red Shaver. Europe has the Cream Legbar (an actual true-breeding pure breed) in Spain this variety is "soniquetera"and ISA Brown sex-links, which also are found in Canada.〔(Isa Brown Commercial Stock & Parent Stock )〕 ==Gallery== File:A_Red_Sex_Link_Rooster_"Freckles".jpg|A Red Sexlink rooster "Freckles" File:Black Rock Hen 'Blackie'.jpg|A Black Rock hen File:RedStarhen.jpg|A red sex-link pullet File:Beautiful Roo by sejr.jpg|A black sex-link rooster "Harry" File:Shipped pullets.jpg|Shipped pullets File:Linda Lee, a pet Red Sex Link hen (2004).jpg|Red sex-link hen "Linda Lee" File:Black Sex Link Chicken.JPG|Black Sex-Link rooster 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sex link」の詳細全文を読む スポンサード リンク
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