Correction: A Continent-Wide Migratory Divide in North American Breeding Barn Swallows (Hirundo rustica)

• Keith A. Hobson, 
• Kevin J. Kardynal, 
• Steven L. Van Wilgenburg, 
• Gretchen Albrecht, 
• Antonio Salvadori, 
• Michael D. Cadman, 
• Felix Liechti, 
• James W. Fox