{"fact":"American and Northwestern crows have been secretly hybridizing over a span of more than 1,500 kilometers along the Pacific coast, creating a vast hybrid zone.","context":"We documented extensive hybridization, with geographic overlap of mtDNA clades and admixture of nuDNA across >1,400 km of western Washington and western British Columbia.","source":"David L. Slager; Kevin L. Epperly; Renee R. Ha; Sievert Rohwer; Chris Wood; Caroline Van Hemert; John Klicka, Cryptic and extensive hybridization between ancient lineages of American crows, 10.1111/mec.15377","index":658}