The bobolink breeds in the summer in North America across much of southern Canada and the northern United States; from 1966-2015 the species experienced a greater than 1.5% annual population decrease throughout most of its breeding range, extending from the Midwestern United States to the Canadian maritimes. The boblink migrates long distances, wintering in southern South America. One bird was tracked migrating over the course of the year, often flying long distances up to in a single day, then stopping to recuperate for days or weeks.