The Wilson's warbler is a small North American warbler. They breed in wet shrubby forests in northern Canada, Alaska and along the Pacific coast. They feed primarily on insects which they glean from branches or catch in flight but they will also eat berries. They are primarily solitary birds outside of the breeding season but will join in mixed flocks while foraging. During the winter Wilson's warblers migrate to Mexico and Central America where they live in a variety of different habitats including tropical high plains, unlike any other species of migrant warbler.