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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.
Melanitta nigra
Male common scoters have a total length of 49 cm with a mass of 1100 g, while females are 45 cm in length and weigh 980 g.
In the wild, the common scoters live from 10 to 15 years.
Melanitta deglandi
Range from 950–2128 g (2.09–4.30 lb) and 48–60 cm (19–22 in).
They live on average for about 12 years.
Oxyura jamaicensis
Length – 340-430 mm (13,5-17 in), weight – 560 g, wingspan – 470 mm (18,5 in).
Lifespan is 13 years in the wild and about 2.5 years in captivity.
Oxyura vittata
The lake duck grows to 36–46 centimeters (14–18 in). Females weigh 510–700 grams (18–25 oz) and males 600–850 grams (21–30 oz).
Oxyura maccoa
Length – 48-51 cm, weight – 450-820 g.
The lifespan is 6 years.
Heteronetta atricapilla
Length – 35-40 cm, mass – 430-630 g.
The maximum lifespan of a black-headed duck is 28 years.
Amazonetta brasiliensis
This is a small duck 40 cm long and weighing 600 g.
Lifespan in captivity is up to 30 years.
Nettapus auritus
It has the average weight of about 285 grams (10.1 oz) for males and 260 grams (9.2 oz) for females.
The lifespan of this species is 10-15 years.
Mergus albellus
The smew is 38–44 cm (15–17 in) long, with a wingspan of 56–69 cm, and a weight 450–650 g.
he maximum known age of smew in Europe is more than 10 years.
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