Theristicus

Theristicus
Black-faced ibis.
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Pelecaniformes
Family:	Threskiornithidae
Genus:	Theristicus Wagler, 1832

Theristicus is a genus of birds in the family Threskiornithidae. They are found in open, grassy habitats in South America. All have a long, decurved dark bill, relatively short reddish legs that do not extend beyond the tail in flight (unlike e.g. Eudocimus and Plegadis), and at least the back is grey.

Taxonomy

Formerly, T. caudatus included T. melanopis as a subspecies, but today all major authorities accept the split.

Image	Scientific name	Common Name	Distribution
	Theristicus caerulescens	Plumbeous ibis	south-western Brazil, especially in southern Mato Grosso and Rio Grande do Sul; Paraguay, especially in the Chaco and in the Paraguayan section of the Parana Basin; Uruguay; north-eastern Argentina and northern and eastern Bolivia
	Theristicus caudatus	Buff-necked ibis	northern and central South America in Colombia, Venezuela, the Guianas and Brazil
	Theristicus melanopis	Black-faced ibis	central Argentina and Chile
	Theristicus branickii	Andean ibis	western South America

References

• Matheu, E., & J. del Hoyo (1992). Family Threskiornithidae (Ibises and Spoonbills). pp. 472–506 in: del Hoyo, J., A. Elliott, & J. Sargatal (editors). Handbook of the Birds of the World. Vol. 1. Ostrich to Ducks. Lynx Edicions, Barcelona. ISBN 84-87334-10-5