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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.
Nettapus pulchellus
Ranging from 30 to 36 cm (12 to 14 in) in length, it is one of the smallest species of duck. It has a 48 to 60 cm (19 to 23.5 in) wingspan.
Green pygmy geese live about 10 years.
Cairina scutulata
Length is 66–81 cm (26–32 in) . Males weigh 2.94–3.9 kg (6.5–8.6 lb), while females weigh 1.95–3.05 kg (4.3–6.7 lb).
The maximum lifespan is 9 years.
Pteronetta hartlaubii
Size – approximately 56 to 58 cm (22 to 23 in.) long, weight – 415 to 430 g (14.5 to 15.05 oz.).
The average lifespan is about 10 years.
Sarkidiornis melanotos
Length can range from 56 to 76 cm (22 to 30 in), weight from 1.03 to 2.9 kg (2.3 to 6.4 lb).
The average lifespan in captivity is about 25 years.
Malacorhynchus membranaceus
Length – 36-45 cm, weight – 270-480 g.
Lifespan can reach 20 years.
Lophonetta specularioides
Length – 50-60 cm, weight – 1 kg.
Lifespan can reach 20 years.
Tachyeres patachonicus
Length – 620-650 mm.
Longevity in captivity – 20 years.
Tachyeres pteneres
At 3.5–7 kg (7.7–15.4 lb) and 65–84 cm (26–33 in) in length.
Longevity in captivity – 20 years.
Stictonetta naevosa
With average weight between 700 - 1200g. Both sexes have a length of 50 – 60 cm.
Lifespan in managed care - at least 18 years.
Anas strepera
The gadwall is 46–56 cm (18–22 in) long. Weighing on average 990 g (35 oz) .
The average lifespan in captivity is up to 15 years.
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