{"fact":"Despite gene flow, only a tiny fraction of the genome (less than 1%) maintains the sharp plumage differences between carrion and hooded crows.","context":"Our results show that the pronounced phenotypic differences between hooded and canion crows are maintained in the face of substantial gene flow by variation in less than 1% of the genome.","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":654}