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Nov 28

To rise from the water, they flap along the surface for many yards. (2014). Their ordinary voice is a low, harsh croak, but during the breeding season, mergansers (including the young) make a plaintive, soft whistle. Successful nesting requires mature forests complete with dead cavity trees, and successful foraging requires waters that are not overburdened by sediment. They tend to avoid saltwater but may be found in estuaries, coastal bays, and lagoons. Common mergansers are important predators of fish in the ecosystem they live in. Its flocks are usually small, but these may combine into big concentrations sometimes at large reservoirs. They also suffer from the loss of habitat and nesting site availability through drainage, pollution, and expansion of agriculture and industry. In places devoid of trees (like Central Asian mountains), they use holes in cliffs and steep, high banks, sometimes at considerable distances from the water. The European population consists of 66,800-103,000 pairs, which equates to 134,000-206,000 mature individuals. Currently, this species is classified as Least Concern (LC) on the IUCN Red List. Common Mergansers spend the breeding season in northern forested habitats near large lakes and rivers. They forage in clear aquatic habitats such as streams, rivers, lakes, coastal bays, and estuaries. They feed mainly on fish but also hunt a wide range of other aquatic prey, such as mollusks, crustaceans, worms, insect larvae, and amphibians. Scandinavian and Russian birds also migrate southwards, but western European birds, and a few in Japan, are largely resident. The North American Breeding Bird Survey, results and analysis 1966-2013 (Version 1.30.15). The female lays 6-17 (most often 8-12) white to yellowish eggs and raises one brood in a season. Common mergansers are diurnal birds that usually do their hunting in the early morning, in the afternoon and before sunset. While they mainly hunt in waters less than about 13 feet deep, in the winter they sometimes venture into deeper waters where fish are schooling. They are not on the 2014 State of the Birds Watch List. Being at the top of the aquatic food chain, this species is particularly susceptible to such effects, and people sometimes use Common Mergansers as an indicator of environmental health. A. and A. S. Love. The Common Merganser can be a salt-water or a fresh-water visitor. The Common Merganser is not common in Tennessee during any part of the year. Broods often join together in groups of multiple females with 40 or more young. Range-wide, Common Mergansers prefer fresh water in all seasons. They are very rare visitors to South Carolina’s coast in the winter months. Incubation lasts 28 to 35 days done only by the female. They can stay under for up to 2 minutes, but they normally dive for less than 30 seconds. Common Mergansers living along rivers may spend hours resting on rocks or on shore. Their diet is heaviest in fish during the winter, and includes salmon, trout, suckers, sculpin, shad, sunfish, sticklebacks, chub, minnows, and eels. In Birds of the World (S. M. Billerman, Editor). When fishing, Common mergansers usually dive for 30 seconds or less, however, they are able to stay underwater for up to 2 minutes! Mergansers prefer living in aquatic habitats with forests and woodlands nearby. Common Mergansers mostly eat fish, but they also eat aquatic invertebrates (including insects, mollusks,... Nesting. Nestlings eat mostly aquatic invertebrates, switching to fish at about 12 days old.Back to top. Back to top, Common Merganser populations in North America declined by over 2% per year between 1966 and 2014, resulting in a cumulative decline of 65%, according to the North American Breeding Bird Survey. Adult males in breeding plumage are easily distinguished; their body is white with a variable salmon-pink tinge, the head is black with an iridescent green gloss, the rump and tail are grey, and the wings are largely white on the inner half, and black on the outer half. This fish-eating duck is the typical merganser of freshwater lakes. In smaller streams, they are present in pairs or smaller groups, and they float down, twisting round and round in the rapids; they also fishing vigorously in a deep pool near the foot of a waterfall or rapid. Common Merganser on The IUCN Red List site -, badelynge, brace, bunch, flock, paddling, raft, https://en.wikipedia.org/wiki/Common_merganser, https://www.iucnredlist.org/species/22680492/132054083. Goosander, American goosander, American merganser, Asiatic goosander, Asiatic merganser, Eastern goosander, Eurasian goosander, Eurasian merganser, Fish duck, Sawbill, Sheldrake.

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