Examples of plumage pigment variation in domestic rock pigeons.

All birds are show homer breed unless otherwise noted. A–C. Eumelanic phenotypes: A, black check; B, blue bar (same color as A, but different pattern); C, brown (Mookee). D–G. Pheomelanic phenotypes: D, ash-red check; E, ash-red bar (same color as D, but different pattern); F, yellow check (dilute form of phenotype in D); G, recessive red (Chinese owl). H. White (white carneau). I. Fantail, a breed examined in subset of association tests. Panels H and I modified after [27,48], respectively; photos courtesy of Eric Domyan (A–F) and Sydney Stringham (H).