World Bird List

Species factsheet

Voices can be found here (external link)

Subspecies and Distribution

-Subspecie
+Distribution
-vauxi
+w Canada to sw USA
-tamaulipensis
+e Mexico
-warneri
+w Mexico
-richmondi
+s Mexico to Costa Rica
-gaumeri
+Yucatán Pen. and Cozumel I. (Mexico)
-ochropygia
+e Panama
-aphanes
+n Venezuela
-andrei
+e Venezuela