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Mute swans usually hiss at competitors or intruders trying to enter their territory. [31] The most familiar sound associated with mute swans is the vibrant throbbing of the wings in flight which is unique to the species and can be heard from a range of 1 to 2 km (0.6 to 1 mi), indicating its value as a contact sound between birds in flight. [23]
Swans are the largest extant members of the waterfowl family Anatidae and are among the largest flying birds. The largest living species, including the mute swan, trumpeter swan, and whooper swan, can reach a length of over 1.5 m (59 in) and weigh over 15 kg (33 lb).
The trumpeter swan has a large, wedge-shaped black bill that can be minimally lined with salmon-pink coloration around the mouth. The bill measures 10.5–12 cm (4.1–4.7 in), up to twice the length of a Canada goose (Branta canadensis) bill; the trumpeter swan bill is the largest of any waterfowl species in the world. The legs are gray-pink ...
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The greylag goose was one of the first animals to be domesticated; this happened at least 3,000 years ago in Ancient Egypt, the domestic subspecies being known as A. a. domesticus. [7] As the domestic goose is a subspecies of the greylag goose they are able to interbreed, with the offspring sharing characteristics of both wild and domestic ...
Barnacle goose (vitkindad gås), Branta leucopsis; Cackling goose (dvärgkanadagås), Branta hutchinsii (A) Canada goose (kanadagås), Branta canadensis (I) Red-breasted goose (rödhalsad gås), Branta ruficollis; Mute swan (knölsvan), Cygnus olor; Tundra swan (mindre sångsvan), Cygnus columbianus; Whooper swan (sångsvan), Cygnus cygnus
Cackling goose: Branta hutchinsii (Richardson, 1832) 16 Bar-headed goose: Anser indicus (Latham, 1790) 17 Emperor goose: Anser canagicus (Sevastianov, 1802) 18 Ross's goose: Anser rossii Cassin, 1861: 19 Snow goose: Anser caerulescens (Linnaeus, 1758) 20 Greylag goose: Anser anser (Linnaeus, 1758) 21 Swan goose: Anser cygnoides (Linnaeus, 1758 ...
The Canada goose (Branta canadensis) is a large species of goose with a black head and neck, white cheeks, white under its chin, and a brown body. It is native to the arctic and temperate regions of North America, and it is occasionally found during migration across the Atlantic in northern Europe.