The Purple Martin (Progne subis) is considered a rare summer visitor or local breeder in western Colorado. Scattered records of these visitors occur from May through July (Bailey and Niedrach, Birds of Colorado, Vol. II, Denver Mus. Nat. Hist., Denver, 1965: 550). These birds usually nest in abandoned woodpecker cavities in trees of the transition zone or higher montane woodlands (Johnston, Condor 68:219-228, 1966). Most west slope records of Purple Martins during the breeding season have been made in the transition zone at elevations of 2600 m or more (Bailey and Niedrach 1965). The only Purple Martin breeding records prior to 1978 have been from the headwaters of Apishapa Creek in western Las Animas County in June 1872 (Sclater 1912 cited by Bailey and Niedrach 1965) and from Fort Lewis, La Plata County, where they nested in hollow trees and latticed ventilators (Morrison 1886, 1888 cited by Bailey and Niedrach 1965). Until recently, due to lack of breeding records, the Purple Martin was considered a migrant or accidental straggler in Colorado (Kingery and Graul, Colorado bird distribution latilong study, Colo. Field Ornithol. and Colo. Div. Wildl., 1978:33). As a result of the sightings reported herein, the first addendum to the Latilong Study shows the Purple Martin breeding in southwestern Colorado (Bardwell and Thomas, C.F.O. Journal 14:66-69, 1980). Andrews (C.F.O. Journal 14:82-87, 1980) also lists the Purple Martin as a confirmed breeder in Colorado in the last 15 years.