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. Author manuscript; available in PMC: 2017 Sep 15.
Published in final edited form as: Dev Biol. 2017 Mar 24;429(2):409–419. doi: 10.1016/j.ydbio.2017.03.022

Figure 4. Variation in feather structure in domestic and wild avian species.

Figure 4

(A–C) Silky feathers are present on the bodies of Silkie chickens (A) and silky fantail pigeons (B), as well as some wild avian species, including the emu (C). (D–F) Curled feathers are present on regions of the body in Frizzle chickens (D), Frillback pigeons (E) and some wild avian species, including on the head of the yellow-knobbed curassow (F). (G–I) A variety of domestic and wild avians display foot feathering (ptilopody), including the Cochin chicken breed (G), fairy swallow pigeon (H), and the snowy owl (I). Photo credit for A, sandyseek; B, Kathleen Winder; C, Benjamint444; D, Celeste Tittle; E, Los Angeles Pigeon Club; F, Jim Capaldi; G, Deann Barrera; H, Sydney Stringham; I, Rachel Jacklyn Bilodeau.