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L. 30-38cm (11Â¾-15 cm), Ws. 59cm
Adult non-breeding: similar to breeding adult but duller and browner, lacks black chin and bill-band
The three subspecies vary slightly in colour of upperparts, overall size, bill size and extent of bill-band and chin patch.
A widespread American grebe breeding almost throughout the USA and in south-central and south-eastern Canada. Further south breeds in Mexico and Central America, in the West Indies and in South America from Colombia and Venezuela south to southern Argentina.
Transatlantic vagrants are regularly recorded, most often in Britain and the Azores but also recorded in Iceland, France, Spain, the Canary Islands and east to Germany and Poland. Nest-building has taken place in France and hybridisation with Little Grebe (Tachybaptus ruficollis) has occurred in Britain and Norway. Also recorded as a vagrant on the Galapagos Islands.
Northernmost birds are migratory and much of the eastern and central North American range is vacated in winter.
There are 3 subspecies:
Breeds on shallow, well-vegetated freshwaters, in winter on larger and more open waters, sometimes estuaries but very rarely on the sea.
Shy and secretive particularly during the breeding season.
Compact shape and thick bill should identify this species at all seasons.
Its diet includes small fish, frogs and tadpoles and aquatic invertebrates.
Breeding season varies with latitude, usually begins mid-May in northern parts of range, earlier further south and all months in tropical areas. Breeds beside small-large freshwaters, nest is a heap of floating vegetation on edge of reedbeds or other marginal vegetation, sometimes on the bottom in shallow water. Eggs: 4-7 (rarely 2-10), whitish, tinged bluish or buff initially soon becoming stained (44 x 30mm). Incubated by both sexes but mainly female for 23-24 days. Young tended by both sexes. Single or double-brooded.
Whinnying call during the breeding season ending with slower, gulping cow-cow-cow notes. Generally silent outside breeding season.
Basically sedentary, however, birds from the northernmost populations head south after breeding to winter in Baja California.
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