found: Work cat.: Slager, D.L. Genomic and morphological analysis of an American crow hybrid zone, 2020:abstr. (Northwestern Crow (Corvus caurinus)) (OCoLC)1154632293
found: ITIS, Sept. 13, 2020(Corvus caurinus. Common name: Northwestern Crow)
found: NCBI taxonomy browser, Sept. 13, 2020(Corvus caurinus (Northwestern crow))
found: Guide to North American birds, via WWW, Sept. 13, 2020(Northwestern Crow, Corvus caurinus)
found: Birds of the world, via WWW, Sept. 13, 2020(Northwestern Crow, Corvus caurinus)