The horned coot (''Fulica cornuta'') is a species of bird found in the Andes of South America. It was described by Bonaparte in 1853 based on a

specimen Specimen may refer to: Science and technology * Sample (material), a limited quantity of something which is intended to be similar to and represent a larger amount * Biological specimen or biospecimen, an organic specimen held by a biorepository ...

collected in Bolivia. For a long time it was known only from the type specimen.

Description

Horned coot males average a little larger than the female. With a total length of and a reported body mass from , it averages slightly smaller than the related

giant coot The giant coot (''Fulica gigantea'') is a species of bird in subfamily Rallinae of family Rallidae, the rails, gallinules, and coots. It is found in Argentina, Bolivia, Chile, and Peru.HBW and BirdLife International (2021) Handbook of the Birds ...

as the second largest coot and the third largest extant species of rail.Jaramillo, A. Burke, P., & Beadle, D. (2003). ''Birds of Chile.'' Christopher Helm. ''CRC Handbook of Avian Body Masses'' by John B. Dunning Jr. (Editor). CRC Press (1992), .Taylor, P. B. (1996). Horned Coot (Fulica cornuta). pp. 209 in: del Hoyo, J., Elliott, A. & Sargatal, J. eds. (1996). ''Handbook of the Birds of the World.'' Vol. 3. Hoatzins to Auks. Lynx Edicions, Barcelona. While most coots have a horny

shield A shield is a piece of personal armour held in the hand, which may or may not be strapped to the wrist or forearm. Shields are used to intercept specific attacks, whether from close-ranged weaponry or projectiles such as arrows, by means of a ...

on the forehead, the horned coot has three wattles in both sexes. The central wattle is large and may possibly be erectile. The three wattles terminate in tufts of filoplumes. At the base of the beak and below the wattle is a fleshy caruncle which is whitish. The bill is olive yellow, brightening to dull orange towards the base. Unlike the giant coot, the legs of the horned coot are dull greenish.

Breeding

The horned coot is

monogamous Monogamy ( ) is a form of Dyad (sociology), dyadic Intimate relationship, relationship in which an individual has only one Significant other, partner during their lifetime. Alternately, only one partner at any one time (Monogamy#Serial monogamy, ...

, and sometimes breeds in colonies of up to 80 pairs. The huge nest is typically located about 40 metres from the shore in the waters of the high altitude lakes where it breeds. Pebbles are piled by the birds to form an artificial island that reaches the water surface. This island is then covered with algae to form the nest. It has been estimated that the pebble mounds may weigh as much as 1.5 tons and they are refurbished in each season. They breed from November to January.Ripley, S. Dillon (1957) Notes on the horned coot, ''Fulica cornuta'' Bonaparte. Postilla 30:1–
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Distribution and habitat

The coot occurs in the altiplano of north-western Argentina, south-western

Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...

, and north-eastern Chile. It is almost entirely restricted to lakes at altitudes of 3000–5200

m.a.s.l. Height above mean sea level is a measure of the vertical distance (height, elevation or altitude) of a location in reference to a historic mean sea level taken as a vertical datum. In geodesy, it is formalized as ''orthometric heights''. The com ...

, but has occasionally been recorded at lower altitudes.

Status and conservation

It is generally a low-density species and the total population has been estimated at 10,000–20,000, with as few as 620 in the Chilean part of its range. Consequently, it is considered to be near threatened by

BirdLife International BirdLife International is a global partnership of non-governmental organizations that strives to conserve birds and their habitats. BirdLife International's priorities include preventing extinction of bird species, identifying and safeguarding ...

and

IUCN The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu ...

References

External links

Photos and call

3D specimen
{{Taxonbar, from=Q1261963 horned coot Birds of Argentina Birds of the Bolivian Andes Birds of Chile Birds of the Southern Andes horned coot horned coot Taxonomy articles created by Polbot