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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.
Netta peposaca
Adults can grow to about 22 inches (56 cm) in length and weigh 2.2-2.6 pounds (1-1.2 kg).
In captivity, rosy-billed pochards can live up to 20 years.
Clangula hyemalis
Measurements: length – 440-600 mm (17,5-23,5 in), weight – 740 g (1, 63 lb), wingspan – 710 mm (28 in).
The long-tailed duck's average lifespan is 15.3 years.
Netta erythrophthalma
It is a medium-sized species measuring about 43cm in length.
In captivity, southern pochards can live up to 20 years.
Aythya fuligula
With an average body length of 42 to 48 cm and a mass of 753.0 to 1026.2 g.
In captivity, these birds can live up to 20 years.
Aythya americana
The redhead is 37 cm (15 in) long . Redhead weight ranges from 2.0-2.5 lbs (907-1134 g).
The average lifespan is up to 20 years.
Aythya australis
Hardheads are small by duck standards, usually not much more than 45 cm long but reaching 60 cm sometimes.
The average lifespan is about 15 years.
Aythya affinis
Adults are 38–48 cm (15–19 in) long. The species can weigh 454–1,089 g (1.001–2.401 lb).
Aythya collaris
Total length falls between 40 and 46 cm. The mass falls between 540 and 900 g.
The average lifespan is up to 15 years.
Aythya novaeseelandiae
Length – 40 cm, weight: males – 695 g, females – 610 g.
In captivity, these birds can live up to 20 years.
Aythya marila
The adult greater scaup is 39–56 cm (15–22 in) long and a body mass of 726–1,360 g (1.601–2.998 lb).
In captivity, these birds can live up to 20 years.
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