A hybrid is born by taking a hen of one breed and breeding her to a rooster from another breed. These hybrids can be sexed at hatch by the color of their feathers and/or other specific markings.

Fig. 1. Coq frise; Fig. 2. Poule du Japon; Volume I, plate XVII, from Ornithologia sive synopsis methodica sistens avium divisionem in ordines, etc. [Ornithologie, ou Méthode contenant la division des ...