(AP) — A tiny songbird that summers in the forests of northern North America has been tracked on a 1,700-mile, over-the-ocean journey from the northeastern United States and eastern Canada to the Caribbean as part of their winter migration to South America, according to a new study. Scientists had long suspected that the blackpoll warbler had made its journey to the Caribbean over the ocean, but the study that began in the summer of 2013 when scientists attached tracking devices to the birds was the first time that the flight has been proven, according to results published Wednesday in the United Kingdom in the journal Biology Letters. "What happens if birds aren't able to fuel sufficiently to make this kind of flight because of habitat fragmentation and habitat loss in New England or the Canadian Maritimes?" Farnsworth said.