Family Ibises, Spoonbills (Threskiornithidae)

Least Concern

Buff-necked Ibis (Theristicus caudatus)


French: Ibis mandore German: Weißhalsibis Spanish: Bandurria común

Scolopax caudatus


, 1783,



Closely related to T. melanopis and T. branickii, and all three formerly considered conspecific. Two subspecies recognized.

Subspecies and Distribution
  • T. c. caudatus (Boddaert, 1783) – Colombia and Venezuela to French Guiana, S to Mato Grosso, Brazil.
  • T. c. hyperorius Todd, 1948 – E Bolivia to SE Brazil, Paraguay, N Argentina and Uruguay.
  • Descriptive notes

    71–76 cm; 1466–1550 g (n = 2). Very similar to T. melanopis, but has part of wing white; buffish of breast does not extend so far down neck, and is... read more


    Quite vocal. Main call is a loud, nasal double-noted cackle "kha-keek", repeated at intervals. This... read more


    Open country in savanna, ranchland, fields and open forests; also small marshes, flooded areas and... read more

    Food and feeding

    Mainly insects; also spiders, centipedes, amphibians, small reptiles and occasionally small mammals; toads (Bufo granulosus):... read more


    In llanos of Venezuela, contrary to most other Ciconiiformes in area, breeds more frequently during dry season; in Córdoba... read more


    Possibly mainly sedentary. Some local movements occur. In Colombia, it seems occasionally to wander... read more

    Status and conservation

    Not globally threatened (Least Concern). Global population thought to be stable although its size is not known with any precision. Both subspecies are estimated to... read more

    Recommended citation

    Matheu, E., del Hoyo, J., Garcia, E.F.J. & Boesman, P. (2020). Buff-necked Ibis (Theristicus caudatus). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 3 April 2020).