The Tennessee warbler (Oreothlypis peregrina) does not now and never has bred in Tennessee. The name comes from the specimen that Alexander Wilson collected on the banks of the Cumberland River while the bird was on migration in 1811. It spends the summers in Canada and is only found in Tennessee during migration. It has a short sharp bill, a thin white line over the eye, an olive-green back, and is white below with a grey wash to the sides. It has no eye-ring. It occurs in North, Central and South America. The Tennessee Warbler specialises in eating the spruce budworm. Consequently its population goes up and down with fluctuations in the populations of the budworm. A more apt name for this species might be the "Coffee Warbler" since it often over-winters in coffee plantations in Latin America.