==References==* Stiles and Skutch "A guide to the birds of Costa Rica" ISBN 0-8014-9600-4* Hilty "Birds of Venezuela" ISBN 0-7136-6418-5* "National Geographic Field Guide to the Birds of North America" ISBN 0-7922-6877-6* Mullarney, Svensson, Zetterstrom and Grant "Collins Bird Guide" ISBN 0-00-219728-6
To so v glavnem ptice stalnice, ampak severne vrste včasih v jeseni poletijo proti jugu ali na nižje nadmorske višine.