Eastern North American birds move south in small groups to the United States wherever ice free conditions exist on lakes and rivers; on the milder Pacific coast, they are permanent residents. Habitat in Breeding Range. [5][6][7], Like the other mergansers, these piscivorous ducks have serrated edges to their bills to help them grip their prey, so they are often known as "sawbills". Common Merganser: Large, sleek diving duck with black upperparts and white underparts. The international Waterfowl Breeding Population and Habitat Survey conducted by the U.S. Common Mergansers, Mergus merganser, have a long slender appearance in flight. When floating leisurely, they position themselves in water similar to ducks, but they also swim deep in water like cormorants, especially when swimming upstream. In larger streams and rivers, they float down with the stream for a few miles, and either fly back again or more commonly fish their way back, diving incessantly the whole way. It is an uncommon to rare migrant and winter resident across the state found on deeper lakes and rivers. [10] Though they move clumsily on land, they resort to running when pressed, assuming a very upright position similar to penguins, and falling and stumbling frequently. Most of these birds are about two feet long, though each species varies in size. Long, thin bill is bright red. Male has flashing white sides, green head, white breast, and long, thin red bill. Hardy in winter, often staying as far north as open water permits. Feeds … Female has gray body and sides; reddish-brown crested head sharply set off from white throat. ", "The origins of moulting Goosanders on the Eden Estuary", "Central Park Races to Save a Rare Duck Gagging on a Piece of Plastic", https://en.wikipedia.org/w/index.php?title=Common_merganser&oldid=1004594898, Creative Commons Attribution-ShareAlike License, This page was last edited on 3 February 2021, at 11:26. They often sit on a rock in the middle of the water, similar to cormorants, often half-opening their wings to the sun. [7][14][15], Overall, the species is not threatened, though illegal persecution by game fishing interests is a problem in some areas. [11], Nesting is normally in a tree cavity, so it requires mature forest as its breeding habitat; they also readily use large nest boxes where provided, requiring an entrance hole 15 cm (5.9 in) in diameter. It is found in the Neotropics, the Nearctic, the Palearctic, and the Indo-Malayan Realm. Common Merganser Predicted Habitat - CWHR B105 [ds2079] SDE Raster Dataset Open this dataset in BIOS Download this dataset Tags biota, habitat, natural resources, wildlife, California, species, environment, birds Summary CWHR Predicted Habitat Suitability. They tend to avoid saltwater but may be found in estuaries, coastal bays, and lagoons. The common merganser eats fish. In addition to fish, they take a wide range of other aquatic prey, such as molluscs, crustaceans, worms, insect larvae, and amphibians; more rarely, small mammals and birds may be taken. He introduced the current binomial name Mergus merganser. Like the other mergansers, these piscivorous ducks have serrated edges to their bills to help them grip their prey, so they are often known as "sawbills". They are very rare visitors to South Carolina’s coast in the winter months. In summer, look for them leading ducklings from eddy to eddy along streams or standing on a flat … [10] The female lays 6–17 (most often 8–12) white to yellowish eggs, and raises one brood in a season. Breeds on wooded rivers and ponds; winters mainly on lakes and rivers, occasionally on salt water. The first formal description of the common merganser was by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae. Reproductive Characteristics Pair formation appears to occur during late winter-early spring. The Common merganser is a common breeding bird in the Refuge and surrounding area, but uncommon in our area during the rest of the year. Subspecific information 3 subspecies. HABITAT: Prefers freshwater over saltwater habitats. According to the IUCN Red List, the total Common merganser population size is around 1,700,000-2,400,000 individuals. The female lays 6-17 (most often 8-12) white to yellowish eggs and raises one brood in a season. To rise from the water, they flap along the surface for many yards. The goosander is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds applies. The summer habitat of the common merganser encompasses rivers and lakes in the boreal forest. The elegant gray-bodied females have rich, cinnamon heads with a short crest. Overall, Common mergansers are not threatened, however, illegal persecution by game fishing interests is a problem in some areas. Its flocks are usually small, but these may combine into big concentrations sometimes at large reservoirs. https://nature.mdc.mo.gov/discover-nature/field-guide/common-merganser Superficially this species is quite similar to the Common Merganser. The common merganser dives for prey like fish, mollusks, and crustaceans. Movements and Migration. Currently, this species is classified as Least Concern (LC) on the IUCN Red List. The Common merganser lacks a distinct crest and has all white under-parts. Breeding males have a dark green head and mostly white body with peachy blush on underparts. Common mergansers nest in tree cavities, nest boxes, cliff crevices, and on the ground, generally near clear-water rivers in forested regions and on mountainous terrain. Juveniles (both sexes) are similar to adult females but also show a short black-edged white stripe between the eye and bill. [16] In February 2020, a rare goosander sighting was documented in Central Park, New York; the bird was in obvious distress, with its beak being trapped by a piece of debris. In addition for the winter they can be found in coastal areas. 69 Outfitters that offer Common Merganser Hunting Trips, Guides and Oufitters found. The contents of this page are made available under a CC BY license Economic Importance for Humans: Positive. 22-27" (56-69 cm). It commonly preys on fish like trout, small salmon, perch, minnows, and eels. Mergus merganser. Common mergansers are often known as "sawbills" due to serrated edges to their bills that help the birds grip their prey. Females, and males in "eclipse" (non-breeding plumage, July to October) are largely grey, with a reddish-brown head, white chin, and white secondary feathers on the wing. Goosander, American goosander, American merganser, Asiatic goosander, Asiatic merganser, Eastern goosander, Eurasian goosander, Eurasian merganser, Fish duck, Sawbill, Sheldrake. Fish and Wildlife Service and the Canadian Wildlife Service does not cover all of the merganser’s breeding range, nor does it distinguish … DIET: This duck feeds on fish, aquatic insects and … ... Habitat Specialization. Fish that have to compete in overpopulated lakes and ponds often do not grow very large. A Common Merganser is a fun bird to see while bird watching. The Common Merganser, Mergus merganser is a diving sea duck whose habitat is forested rivers and lakes North America and Eurasia. Common mergansers are known to form crèches, with single females having being observed with over 70 ducklings at one time! Individuals can grow to 2054 g. Reproduction is dioecious. 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