Buff-necked Ibis (Threskiornis caudatus)

Buff-necked Ibis

[order] CICONIIFORMES | [family] Threskiornithidae | [latin] Threskiornis caudatus | [authority] Boddaert, 1783 | [UK] Buff-necked Ibis | [FR] Ibis mandore | [DE] Weisshals-Ibis | [ES] Bandurria comun | [NL] Geelhalsibis


Monotypic species


Threskiornis is a genus of , wading birds of the family Threskiornithidae. They occur in the warmer parts of the Old World in southern Asia, Australasia and sub-Saharan Africa. They are colonial breeders, which build a stick nest in a tree or bush and lay 2-4 eggs. They occur in marshy wetlands and feed on various fish, frogs, crustaceans and insects. Adult Threskiornis ibises are typically 75cm long and have white body plumage. The bald head, neck and legs are black. The bill is thick and curved. Sexes are similar, but juveniles have whiter necks duller plumage. The Straw-necked Ibis differs from the other species in having dark upperparts, and is some times placed in the separate genus Carphibis (Jameson, 1835)as Carphibis spinicollis.

Physical charateristics

It is a distinctive bird with its long decurved bill, black face and buffy head neck and chest with rusty crown and lower chest. Note also the white on the wings, the red legs and the black underparts and tail. It is polytypic, with a northern paler subspecies and a southern subspecies that together with the Black-faced Ibis of the Andes form a superspecies

Listen to the sound of Buff-necked Ibis

[audio:http://www.planetofbirds.com/MASTER/CICONIIFORMES/Threskiornithidae/sounds/Buff-necked Ibis.mp3]

Copyright remark: Most sounds derived from xeno-canto

wingspan min.: 0 cm wingspan max.: 0 cm
size min.: 71 cm size max.: 76 cm
incubation min.: 0 days incubation max.: 0 days
fledging min.: 0 days fledging max.: 0 days
broods: 1   eggs min.: 2  
      eggs max.: 4  


South America : widespread. The Buff-necked Ibis is found in the Magdalena valley of Colombia and on the eastern side of the Andes from Venezuela to northern Argentina and Uruguay.


It occurs in a wide variety of open habitats such as savanna, ranchland and open forest, but is notable for often being found far from water.


It has the greatest nest site diversity of any member of its family (Threskiornithidae) with solitary nests to large colonies, placed in a variety of locations such as tree stumps in swampy areas, reed mats, rocky outcrops, cliffs, gullies, or trees in patches of woodland. The female usually lays 2-4 eggs in a platform nest, made from twigs and branches, in a tree. Usually the nest is build along a water body like a river or lake.

Feeding habits

Its diet consists mainly of insects, spiders, frogs, reptiles, snails, invertebrates and small mammals found in soft soils.

Video Buff-necked Ibis


copyright: J. del Hoyo


This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size may be moderately small to large, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
Buff-necked Ibis status Least Concern


Possibly sedentary; some local movements occur. In Colombia, seems occasionally to wander W of Andes; accidental in E Panama.

Distribution map

Buff-necked Ibis distribution range map

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