I suppose you could say the canaries were freed, but this particular group was traced in the Appalachian mountains for years following the wreck. Eventually forming into 7 groups, most had a hard time surviving in the wild. One surviving group was traced to a nesting site across the Cumberland Gap where they had migrated. Most of the local folk enjoyed having these unique birds in their hills. The main nesting area was on the Clinch River northwest of Knoxville. However, the mercury contaminating the river along with the proximity to Oak Ridge, where the birds were often seen feeding, caused mutations and eventually death to the almost the entire flock. The only known descendant of these birds can be seen today on Sesame Street at PBS. catspaw49