{"fact":"In crows, the color of their feathers isn't just skin-deep — it involves a host of genes and an entire pigmentation pathway.","context":"Differentially expressed genes predominated in growing feather follicles from the torso, where carrion crows produce black feathers and hooded crows gray feathers, with an overrepresentation of genes in the melanogenesis pigmentation pathway.","source":"J. W. Poelstra; N. Vijay; C. M. Bossu; H. Lantz; B. Ryll; I. Müller; V. Baglione; P. Unneberg; M. Wikelski; M. G. Grabherr; J. B. W. Wolf, The genomic landscape underlying phenotypic integrity in the face of gene flow in crows, 10.1126/science.1253226","index":657}