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The whooper swan (/ˈhuːpə(ɹ) swɒn/ "hooper swan"; Cygnus cygnus), ... The cygnets hatch after about 36 days and have a grey or brown plumage. The cygnets can fly ...
Adult plumage is entirely white. Like mute swan cygnets, trumpeter swan cygnets have light grey plumage and pinkish legs, gaining their white plumage after about a year. As with the whooper swan, this species has an upright posture and generally swims with a straight neck.
The whooper swan and tundra swan are wholly migratory, and the trumpeter swans are almost entirely migratory. [16] There is some evidence that the black-necked swan is migratory over part of its range, but detailed studies have not established whether these movements are long or short-range migration.
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Whooper swan: Cygnus cygnus: Anatidae: 8,200 metres (27,000 feet) This height was attained by a flock of whooper swans flying over Northern Ireland, and recorded by radar. [2] [5] Alpine chough: Pyrrhocorax graculus: Corvidae: 8,000 metres (26,500 feet) This height was recorded on Mount Everest. [5] Bearded vulture: Gypaetus barbatus: Accipitridae
The swans, ducks and geese are ... Whooper swan, Cygnus cygnus; Wood duck, Aix sponsa ... Plumage colouration varies, with the majority having mainly dark plumage ...
They regularly forage in close association with Bewick's and whooper swans, two species that trample underwater sediment to excavate food. Studies have shown that this behaviour greatly increases the food intake rate of the pochards, as they glean food items that drift away from where the swans are trampling.
The whooper swan is the national bird of Finland.. This is a list of the bird species recorded in Finland.The avifauna of Finland included a total of 501 confirmed species as of October 2024, according to BirdLife Suomi, with supplemental additions from Avibase. [1]