↑Dunning Jr. JB. 2008. CRC Handbook of Avian Body Masses 2nd Edition. Florida: CRC Press.
↑ 2.02.1Blake ER. 1977. Manual of Neotropical Birds, Vol I. Chicago.
↑Hancock J, Kushlan J. 1984. The Herons handbook. Croom Helm, 1st edition.
↑CRC Handbook of Avian Body Masses by John B. Dunning Jr. (Editor). CRC Press (1992), ISBN 978-0-8493-4258-5.
↑James A. Kushlan, James A. Hancock, illustrated by David Thelwell: The Herons. In: Bird families of the world. Band 14, Oxford University Press, Oxford 2005, ISBN 0-19-854981-4. p.92