Figure 5 in The dark side of birds: melanism-facts and fiction

Figure 5. 'Yellow' is a dominant mutation of the agouti gene in Common Quail Coturnix coturnix (NHMUK 1996.41.441, England) resulting in a coloration based on mainly phaeomelanin (Harry Taylor, © Natural History Museum, London) Figure 6.. Hooded Crow Corvus corone cornix (left, NHMUK 1965.M.19466), Carrion Crow C. c. corone (right, NHMUK 2013.5.13) and their hybrid offspring, with in centre a first-generation hybrid (NHMUK 1965.M.19463), left of it a backcross Hooded Crow (NHMUK 1879.3.7.1) and right a backcross Carrion Crow (NHMUK 1925.2.12.1); both the Hooded Crow and all of the hybrids display many patterned feathers with black centres and grey fringes (Harry Taylor, © Natural History Museum, London)