{"fact":"The Caribbean islands have been colonized by crows at least twice throughout history.","context":"We infer that two clades independently colonized the Caribbean islands in the late Miocene (Clades II and III).","source":"Knud A Jønsson; Pierre-Henri Fabre; Martin Irestedt, Brains, tools, innovation and biogeography in crows and ravens, 10.1186/1471-2148-12-72","index":241}