10 Aves nadadoras no Mundo

10 Flightless avian swimmers
Some examples of birds that have lost the ability to fly in favor of an aquatic lifestyle.

1. Penguins
File:Pygoscelis papua -Nagasaki Penguin Aquarium -swimming underwater-8a.jpg
The penguin is an accomplished swimmer, having flippers instead of wings.
One of the most highly adapted birds for swimming, penguins swim via lift produced by their wings and demonstrate a highly streamlined body shape that reduces drag.

2. Flightless Cormorants (Phalacrocorax harrisi)
File:Flightless Cormorant (Phalacrocorax harrisi) -swimming.jpg
Swimming just below the surface of shallow sea water.
The Flightless Cormorant cannot fly with its abnormally small wings, but it is a highly efficient swimmer using its hind limbs to produce thrust.

3. Magellanic Flightless Steamer Duck


4. Falkland Flightless Steamer Duck


5. White-headed Flightless Steamer Duck


6. Auckland Island Teal


7. Campbell Island Teal


8. Great Auk (extinct in the mid-19th century)


9. Mancalla (Mancallinae) (extinct)

10. Hesperornithes (Hesperornis regalis) (extinct)
File:Hesperornis BW.jpg

Source: wikipedia.org

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