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ducks
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Duck is the common name for numerous species in the waterfowl family Anatidae. Ducks are divided among several subfamilies in the family Anatidae; they do not represent a monophyletic group (the group of all descendants of a single common ancestral species) but a form taxon, since swans and geese are not considered ducks.
Ducks are sometimes confused with several types of unrelated water birds with similar forms, such as loons or divers, grebes, gallinules and coots.
Anas undulata
The yellow-billed duck is a 51–58 cm long dabbling duck.
The average lifespan in captivity is 20-25 years.
Anas rubripes
The American black duck weighs 720–1,640 g (1.59–3.62 lb) and measures 54–59 cm (21–23 in) in length.
Lifespan in captivity is up to 30 years.
Anas sparsa
It is a medium-sized duck, length 48–57 cm.
Its average lifespan in captivity is about 15 years.
Anas fulvigula
The adult mottled duck is 44 to 61 cm (17–24 in) long from head to tail.
On average they live for only 2 years.
Anas superciliosa
The size range is 54–61 cm.
The average lifespan is up to 10 years.
Anas melleri
Length: 55-65 cm. Weight: males: 883-1240 g, females: 831-1140 g.
In captivity, Meller's ducks have a lifespan of 10 to 15 years.
Anas luzonica
The length of an adult bird is 48-58 cm.
Lifespan in captivity is up to 25 years.
Anas americana
The American wigeon is a medium-sized bird. It is 42–59 cm (17–23 in) long, with a 76–91 cm (30–36 in) wingspan and a weight of 512–1,330 g (1.129–2.932 lb).
Lifespan in captivity is up to 30 years.
Anas sibilatrix
The Chiloé wigeon has a body length of 46 to 56 cm (18 to 22 in), weight is approximately 800 g (28 oz).
Lifespan in captivity is up to 30 years.
Anas penelope
This duck is 42–52 cm (17–20 in) long with a 71–80 cm (28–31 in) wingspan, and a weight of 500–1,073 g (1.102–2.366 lb).
Lifespan in captivity is up to 15 years.
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