World Bird List

Species factsheet
Grey-breasted Martin (Progne chalybea)

Order: Progne chalybea
Family: Swallows, Martins (Hirundinidae)

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
chalybea e Mexico through n South America
warneri w Mexico
macrorhamphus c and sc South America
Annoncer