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Great crested grebe, by JJ Harrison. ... Jacky winter, by Fir0002. ... Greater crested tern, first year plumage, by benjamint444 ...
The great crested grebe is the largest species of grebe in the Old World, though some larger species occur in the Americas. They measure 46–51 cm (18–20 in) long with a 59–73 cm (23–29 in) wingspan and weigh 0.9 to 1.5 kg (2.0 to 3.3 lb).
Grebes are small to medium-large in size ranging from the least grebe (Tachybaptus dominicus), at 120 g (4.2 oz) and 23.5 cm (9.3 in), to the great grebe (Podiceps major), at 1.7 kg (3.7 lb) and 71 cm (28 in). Despite these size differences grebes are a homogenous family of waterbirds with very few or slight differences among the genera.
A – resident breeder and winter visitor Pied-billed grebe (Podilymbus podiceps) A – rare vagrant; has hybridised with Little grebe once Red-necked grebe (Podiceps grisegena) A – winter visitor; has bred Great crested grebe (Podiceps cristatus) A – resident breeder and winter visitor Slavonian grebe (Podiceps auritus)
Anhingas or darters are often called "snake-birds" because of their long thin neck, which gives a snake-like appearance when they swim with their bodies submerged. The males have black and dark-brown plumage, an erectile crest on the nape, and a larger bill than the female. The females have much paler plumage especially on the neck and underparts.
The type species was subsequently designated as the great crested grebe (Podiceps cristatus). [3] The genus name combines variants on the Latin podex, roughly meaning "rear-end", and pes, meaning "foot". [4] The black-necked, Colombian, silvery, and Junin grebes are very closely related and were formerly sometimes separated as the genus Dyas.
Double-crested cormorant. Cormorants are medium-to-large aquatic birds, usually with mainly dark plumage and areas of colored skin on the face. The bill is long, thin, and sharply hooked. Their feet are four-toed and webbed. Double-crested cormorant, Nannopterum auritum; Neotropic cormorant, Nannopterum brasilianum