Silkie the "SHH" gene, called the ZPA Regulatory Sequence (ZRS). This causes ectopic "SHH" expression in the anterior of the developing limb bud, leading to increased tissue growth and digits. While the feet of the Silkie display polydactyly, the wings have the standard tridactyly (three digit) arrangement. The Japanese Silkie initially develops additional digits in the wing as an embryo, but these are lost prior to hatching. The genetic cause behind Silkie polydactyly differs from those that cause polydactyly in the Dorking chicken breed, which is due to ectopic "FGF4" expression in the AER, with ectopic "SHH" a secondary effect. The
Fitcher's Bird Fitcher's Bird "Fitcher's Bird" (German: "Fitchers Vogel") is a German fairy tale collected by the Brothers Grimm, tale number 46. It is Aarne-Thompson type 311, the heroine rescues herself and her sisters. Another tale of this type is "How the Devil Married Three Sisters". The Brothers Grimm noted its close similarity to the Norwegian "The Old Dame and Her Hen", also grouped in this tale type. The tale also features the motifs of the "Forbidden chamber" and a bloodied item that betrays the bride peeking in that chamber against strict orders, and as such bears resemblance to the "Bluebeard" type