[order] ANSERIFORMES | [family] Anatidae | [latin] Aythya collaris | [authority] Donovan, 1809 | [UK] Ring-necked Duck | [FR] Fuligule a collier | [DE] Ringschnabel-Ente | [ES] Porron Acollarado | [NL] Ringsnaveleend
Aythya is a genus of diving ducks. It has twelve described species. Aythya shihuibas was described from the Late Miocene of China. An undescribed prehistoric species is known only from Early Pleistocene fossil remains found at Dursunlu, Turkey; it might however be referrable to a paleosubspecies of an extant species considering its age. The Miocene “Aythya” arvernensis is now placed in Mionetta, while “Aythya” chauvirae seems to contain the remains of 2 species, at least one of which does not seem to be a diving duck.
Although male ring-necked ducks superficially resemble their counterparts in greater and lesser scaups, their peaked, angular head profile, distinctive white bill markings, and uniformly dark upper wings distinguish them. Female ring-necked ducks most closely resemble female redheads, but are distinguished by their smaller size, peaked, angular head profile, and pale region around the face. Male ring-necked ducks have an iridescent black head, neck, breast and upperparts. The belly and flanks are whitish to grayish with a distinctive triangular white wedge extending upward in the area in front of the folded wing. The bill is slate with a white border around the base and nares and a pale white band behind the black tip. Their name is derived from a faint brownish ring around the base of the neck, which is visible only upon close inspection. The legs and feet are gray-blue and the iris is yellow. Relatively silent except in display when a low whistling note is uttered. Female ring-necked ducks have a brown head with a black crown, light brown cheeks and chin, and a white eye-ring. A narrow white line extends from the eye to the back of the head. The bill is slate with a faint white band near the tip. The neck, back, sides, and flanks are brown and the belly is white. The legs and feet are gray-blue and the iris is brown.
Listen to the sound of Ring-necked Duck
Copyright remark: Most sounds derived from xeno-canto
North America : widespread
In winter, ring-necked ducks use a variety of habitats, such as fresh and brackish marshes, shallow lakes, estuarine bays, and coastal lagoons. During breeding they prefer sedge-meadow marshes, swamps, and bogs surrounded by woody vegetation
Ring-necked ducks breed from southeastern and east-central Alaska, central British Columbia eastward through northern Saskatchewan to Newfoundland, south to northeastern California, southeastern Arizona, southern Colorado, Iowa, Illinois, northern New York, and Massachusetts. They prefer sedge-meadow marshes, swamps, and bogs surrounded by woody vegetation. Female ring-necked ducks nest in flooded or floating emergent vegetation and lay an average of 8 to 10 eggs.
Ring-necked ducks dive in shallow water to feed on tubers, seeds, and leaves of moist-soil and aquatic plants (pondweeds, coontail, water milfoil, hydrilla, sedges, grasses, wild rice, etc.). They also eat aquatic insects, snails, and clams.
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be increasing, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is extremely large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
The majority of ring-necked ducks migrate through the Central and Mississippi Flyways to inland wintering grounds along the Gulf of Mexico and the southern Atlantic coast of the USA. In winter, ring-necked ducks use a variety of habitats, such as fresh and brackish marshes, shallow lakes, estuarine bays, and coastal lagoons. Ring-necked ducks are winter visitors to Central America and the northern Caribbean, and vagrant to Trinidad and Venezuela. vagrant to Western Europe, most notably Ireland and the UK
Migratory; winters in lowlands mostly along Atlantic and Gulf coasts, but also following Pacific, and S to Panama and West Indies. A regular trans-Atlantic vagrant, most frequent in Britain, but records from most of Europe; has also occurred NW Africa (Morocco) and Japan.