These birds breed throughout the United States and southern Canada, and down to central Mexico. They winter in South America.

This is the largest (8 inches long) of the swallow tribe. It formerly built its nest in cavities of trees and still does in wild districts, but having learned to live close to humans, it soon adopted domestic habits. The best way to have martins around is to erect apartment houses for them at suitable nesting sites—and protect that housing from use by other birds. The nest boxes should be about 15 feet from the ground and made inaccessible to cats. A colony of martins makes great inroads upon the insect population, as the birds not only feed upon insects but rear their young on the same diet.