Podiceps major

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Archosauromorpha
Cladus: Crurotarsi
Divisio: Archosauria
Cladus: Avemetatarsalia
Cladus: Ornithodira
Subtaxon: Dinosauromorpha
Cladus: Dinosauriformes
Cladus: Dracohors
Cladus: Dinosauria
Ordo: Saurischia
Cladus: Eusaurischia
Subordo: Theropoda
Cladus: Neotheropoda
Cladus: Averostra
Cladus: Tetanurae
Cladus: Avetheropoda
Cladus: Coelurosauria
Cladus: Tyrannoraptora
Cladus: Maniraptoromorpha
Cladus: Maniraptoriformes
Cladus: Maniraptora
Cladus: Pennaraptora
Cladus: Paraves
Cladus: Eumaniraptora
Cladus: Avialae
Infraclassis: Aves
Cladus: Euavialae
Cladus: Avebrevicauda
Cladus: Pygostylia
Cladus: Ornithothoraces
Cladus: Ornithuromorpha
Cladus: Carinatae
Parvclassis: Neornithes
Cohors: Neognathae
Cladus: Neoaves
Cladus: Mirandornithes
Ordo: Podicipediformes

Familia: Podicipedidae
Genus: Podiceps
Species: Podiceps major
Subspecies: P. m. major – P. m. navasi
Name

Podiceps major (Boddaert, 1783)
Synonymy

Colymbus major (protonym)

References

Table des Planches Enluminéez d'Histoire Naturelle de M. D'Aubenton: pl. 24 BHL

Vernacular names
العربية: غطاس كبير
български: Магеланов гмурец
català: Cabussó gros
Cymraeg: Gwyach fawr
Deutsch: Magellantaucher
English: Great Grebe
Esperanto: Granda grebo
español: Huala
فارسی: کشیم بزرگ
suomi: Isouikku
français: Grand Grèbe
hrvatski: Veliki gnjurac
magyar: Nagy vöcsök
italiano: Svasso gigante
Nederlands: Grote fuut
norsk: Spydnebbdykker
Diné bizaad: Naalʼeełii keelóól ntsaaígíí
polski: Perkoz olbrzymi
русский: Магелланова поганка
srpskohrvatski / српскохрватски: Veliki gnjurac - велики гњурац
svenska: Stordopping

The great grebe (Podiceps major) is the largest species of grebe in the world. A disjunct population exists in northwestern Peru, while the main distribution is from extreme southeastern Brazil to Patagonia and central Chile. The population from southern Chile is considered a separate subspecies, P. m. navasi.

Taxonomy

The great grebe was described by the French polymath Georges-Louis Leclerc, Comte de Buffon in 1781 in his Histoire Naturelle des Oiseaux.[2] The bird was also illustrated in a hand-coloured plate engraved by François-Nicolas Martinet in the Planches Enluminées D'Histoire Naturelle which was produced under the supervision of Edme-Louis Daubenton to accompany Buffon's text.[3] Neither the plate caption nor Buffon's description included a scientific name but in 1783 the Dutch naturalist Pieter Boddaert coined the binomial name Colymbus major in his catalogue of the Planches Enluminées.[4] Buffon mistakenly believed that his specimen had come from Cayenne in French Guiana.[5] The great grebe is now placed in the genus Podiceps that was erected by the English naturalist John Latham in 1787.[6][7]

Two subspecies are recognised:[7]

P. m. major, (Boddaert, 1783), West Peru, Paraguay, southeastern Brazil, Uruguay to central Chile & southern Argentina
P. m. navasi, (Manghi, 1984), Southern Chile

Habitat

This species occurs mainly in open waterways. Most birds are seen on low altitude lakes and sluggish rivers (often surrounded by forests), as well as estuarine marshes. While breeding, it frequents the heavily vegetated inlets off of large lakes. Outside of the breeding season, most birds will move to estuaries and bays, usually heavy with kelp (occasionally, they even are seen on the open sea). Non-breeding birds may live along the coasts all year.

These birds are widespread and common through most of their range. Much of their native habitat has not been cleared, especially in the southern portions of their range.
In Rio Grande do Sul, Brazil
Description

This is a very large grebe, with proportions more like a goose or a cormorant than a typical grebe. They range in length from 67 to 80 cm (26.5 to 31.5 in) and usually weigh about 1,600 grams (3.5 pounds), but can scale to at least 2 kg (4.4 lb). They are buffy-rufous on the neck and chest, blackish on the back and have a whitish belly. The head is sooty gray with a reddish-brown eye. Due to its size and unique coloration, the great grebe is unlikely to be confused with any other bird, including other grebes.
Diet

The great grebe lives on a diet mostly of fish, sometimes over 11 cm (4.3 in) long, but usually smaller. Prey competition can occasionally occur with the neotropic cormorant over fish, but that species (in spite of smaller body size) usually takes larger fish. Also insects, crustaceans and mollusks are taken. The diet can switch to almost half crabs during the wintertime along the coasts, and these birds can also take the young of other waterbirds, especially coots.
Breeding

After living in groups numbering up to the hundreds, these birds move inland to breed. Most populations lay their eggs from October to January, becoming later further south. In the isolated Peru population, nesting occurs in September & October, with a possible second clutch in January or February. They are moderately social when breeding, occasionally forming colonies. Three to five eggs (sometimes six) are laid. Two broods, or possibly more, can be raised at the same time.
References

BirdLife International (2016). "Podiceps major". IUCN Red List of Threatened Species. 2016: e.T22696596A93573021. doi:10.2305/IUCN.UK.2016-3.RLTS.T22696596A93573021.en. Retrieved 12 November 2021.
Buffon, Georges-Louis Leclerc de (1781). "Le grand grèbe". Histoire Naturelle des Oiseaux (in French). Vol. 15. Paris: De L'Imprimerie Royale. p. 375.
Buffon, Georges-Louis Leclerc de; Martinet, François-Nicolas; Daubenton, Edme-Louis; Daubenton, Louis-Jean-Marie (1765–1783). "Grebe de Cayenne". Planches Enluminées D'Histoire Naturelle. Vol. 5. Paris: De L'Imprimerie Royale. Plate 404 fig 1.
Boddaert, Pieter (1783). Table des planches enluminéez d'histoire naturelle de M. D'Aubenton : avec les denominations de M.M. de Buffon, Brisson, Edwards, Linnaeus et Latham, precedé d'une notice des principaux ouvrages zoologiques enluminés (in French). Utrecht. p. 24, Number 404.1.
Mayr, Ernst; Cottrell, G. William, eds. (1979). Check-list of Birds of the World. Vol. 1 (2nd ed.). Cambridge, Massachusetts: Museum of Comparative Zoology. p. 149.
Latham, John (1787). Supplement to the General Synopsis of Birds. London: Printed for Leigh & Sotheby. p. 294.

Gill, Frank; Donsker, David, eds. (2019). "Grebes, flamingos, buttonquail, plovers, painted-snipes, jacanas, plains-wanderer, seedsnipes". World Bird List Version 9.2. International Ornithologists' Union. Retrieved 15 July 2019.

del Hoyo, Elliott & Sargatal. Handbook of Birds of the World, Volume 1 Ostrich to Ducks, ISBN 84-87334-10-5