Extensive gene flow characterizes the phylogeography of a North American migrant bird: Black-headed Grosbeak (Pheucticus melanocephalus).
van Els P, Spellman GM, Smith BT, Klicka J. Extensive gene flow characterizes the phylogeography of a North American migrant bird: Black-headed Grosbeak (Pheucticus melanocephalus). Mol Phylogenet Evol. 2014 Sep; 78:148-59.