The Blue-winged Warbler reaches the northern limit of its distribution in southern Ontario and Quebec, breeding primarily in shrublands and forest edges; it overwinters from southern Mexico through much of Central America and most of the Caribbean. There are approximately 24,000 individuals in Canada, representing 4% of the global population and a low degree of Canadian responsibility. The Breeding Bird Survey indicates that the Canadian population has increased by nearly 900% since 1970. Although reliability of this source is only medium for this species because of some identification challenges, the magnitude of change is great enough to have high confidence that there has been a large increase of at least 100%. The Canadian population of Blue-winged Warbler is within its goal range.