The giant coot (''Fulica gigantea'') is a species of
bird
Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweigh ...
in subfamily Rallinae of family
Rallidae
The rails, or Rallidae, are a large cosmopolitan family of small- to medium-sized, ground-living birds. The family exhibits considerable diversity and includes the crakes, coots, and gallinules. Many species are associated with wetlands, althoug ...
, the rails, gallinules, and coots. It is found in
Argentina
Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...
,
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 ...
,
Chile
Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a ...
, and
Peru
, image_flag = Flag of Peru.svg
, image_coat = Escudo nacional del Perú.svg
, other_symbol = Great Seal of the State
, other_symbol_type = Seal (emblem), National seal
, national_motto = "Fi ...
.
[HBW and BirdLife International (2021) Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 6. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v6_Dec21.zip retrieved August 7, 2022][Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 24 July 2022. Species Lists of Birds for South American Countries and Territories. https://www.museum.lsu.edu/~Remsen/SACCCountryLists.htm retrieved July 24, 2022]
Taxonomy and systematics
The giant coot is
monotypic
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...
.
[
]
Description
The giant coot is the second largest extant member of family Rallidae, after the takahe of New Zealand.[Taylor, P. B. (1996). Giant Coot (Fulica gigantea). 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. ] Adults are long. They weigh about and are too heavy to fly, though immature birds are smaller and readily fly. The sexes are alike. Adults have a bulky body and a disproportionately small head. Their plumage is deep slaty gray that is blacker on the head and neck. Their undertail coverts
A covert feather or tectrix on a bird is one of a set of feathers, called coverts (or ''tectrices''), which, as the name implies, cover other feathers. The coverts help to smooth airflow over the wings and tail. Ear coverts
The ear coverts are s ...
have some white streaking. Their bill is deep red with some yellow at the base of the maxilla
The maxilla (plural: ''maxillae'' ) in vertebrates is the upper fixed (not fixed in Neopterygii) bone of the jaw formed from the fusion of two maxillary bones. In humans, the upper jaw includes the hard palate in the front of the mouth. The t ...
, their frontal shield is yellow, and unique among coots their legs and feet are deep red. Immature birds have dark gray underparts and a paler bill and legs than adults. Juveniles are dark dull gray with some white on the face and dusky legs.[Taylor, B. (2020). Giant Coot (''Fulica gigantea''), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.giacoo1.01 retrieved November 24, 2022]
Distribution and habitat
The giant coot is found from southern Peru through western Bolivia into northern Chile and northwestern Argentina. It is a bird of the Altiplano
The Altiplano (Spanish for "high plain"), Collao (Quechua and Aymara: Qullaw, meaning "place of the Qulla") or Andean Plateau, in west-central South America, is the most extensive high plateau on Earth outside Tibet. The plateau is located at the ...
, a generally barren high elevation landscape. There it inhabits ponds and lakes, especially those with weedy shallows. It mainly occurs between but is regular as high as and occasionally wanders as far as the Pacific coast.[
]
Behavior
Movement
Giant coot adults are generally sedentary though they may walk to open water if a small pond freezes. Immature birds disperse by flying at night.[
]
Feeding
The giant coot feeds mostly on aquatic vegetation, especially plants of genera ''Myriophyllum
''Myriophyllum'' (water milfoil) is a genus of about 69 species of freshwater aquatic plants, with a cosmopolitan distribution. The center of diversity for ''Myriophyllum'' is Australia with 43 recognized species (37 endemic).
These submersed ...
'', ''Potamogeton
''Potamogeton'' is a genus of aquatic, mostly freshwater, plants of the family Potamogetonaceae. Most are known by the common name pondweed, although many unrelated plants may be called pondweed, such as Canadian pondweed (''Elodea canadensis'' ...
'', ''Zannichellia
''Zannichellia'' (common name horned pondweed) is a genus of submerged aquatic flowering plant, with threadlike leaves and tiny flowers. It is fully adapted to an aquatic life cycle, including underwater pollination
Pollination is the tran ...
'', and ''Ruppia
''Ruppia'', also known as the widgeonweeds, ditch grasses or widgeon grass, is the only extant genus in the family Ruppiaceae, with eight known species. These are aquatic plants widespread over much of the world. The genus name honours Heinrich ...
''. It also eats algae but shuns '' Chara''. It feeds mostly at the water surface but occasionally dabbles like a duck or dives; it also grazes on shore.[
]
Breeding
The giant coot breeds at any season, but its peak egg-laying period is the local winter of June and July. The species is monogamous and very territorial. It makes a huge nest of plant material dredged and piled up in water about deep. Newish nests float but as nesting progresses and both members of the pair add material it usually ends up resting on the bottom. The clutch size is three to seven eggs and both parents incubate them. Young feed on fresh vegetation added to the nest and also on plants and small animal prey such as amphipods and tadpoles brought by the parents.[
]
Vocalization
Male giant coots make "alternating gobbling or laughing 'houehouhouhouhoou' and low, growling 'hrr' or 'horr' sounds". Females make "low, crackling 'chee-jrrrh' ndlow squeaking or cracking sounds"; when with a male they also make a "soft 'hi-hirr hirrr hirrr...'".[
]
Status
The 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 ...
has assessed the giant coot as being of Least Concern. It has a large range and its estimated population of up to 67,000 mature individuals is believed to be stable. No immediate threats have been identified.[ Though it is generally scarce in much of its range, some areas have large populations, and the populations in Chile and Peru have increased due to controls on firearms.][
]
Gallery
File:Fulica gigantea - Giant Coot (Young).jpg, Young
File:Fulica gigantea-Giant Coot (Adult and young).jpg, Adult and young feeding
File:Giant Coot (408046403) (cropped).jpg, Giant coot with several young
File:Fulica gigantea (8396928374).jpg, Several adult Giant Coots resting on land at Chungara Park, northernmost Chile.
References
{{Taxonbar, from=Q785664
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 ...
Birds of the Altiplano
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 ...
Taxonomy articles created by Polbot