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flightless bird

Flightless birds are birds that through evolution lost the ability to fly. There are over 60 extant species including the well known ratites (ostrich, emu, cassowary, rhea and kiwi) and penguins. The smallest flightless bird is the Inaccessible Island rail (length 12.5 cm, weight 34.7 g). The largest (both heaviest and tallest) flightless bird, which is also the largest living bird, is the ostrich (2.7 m, 156 kg). Ostriches are farmed for their decorative feathers, meat and their skins, which are used to make leather. Many domesticated birds, such as the domestic chicken and domestic duck, have lost the ability to fly for extended periods, although their ancestral species, the red junglefowl and mallard, respectively, are capable of extended flight. A few particularly bred birds, such as the Broad Breasted White turkey, have become totally flightless as a result of selective breeding; the birds were bred to grow massive breast meat that weighs too much for the bird's wings to support in flight. Flightlessness has evolved in many different birds independently. There were also other families of flightless birds, such as the now extinct Phorusrhacidae, that evolved to be powerful terrestrial predators. Taking this to a greater extreme, the terror birds (and their relatives the bathornithids), eogruids, gastornithiforms, and dromornithids (all extinct) all evolved similar body shapes – long legs, long necks and big heads – but none of them were closely related.
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A family of penguins

Added 3 weeks ago by kajtek

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penguins - the beauty of penguins
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penguins

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Minionek

Added 2 months ago by minionek

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Added 2 months ago by Marcin

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Added 3 months ago by #Zakreconax3

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Added 4 months ago by Basiunia

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Easter atmosphere

Added 4 months ago by stachna

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dodo puzzle - dodo jigsaw puzzle dodo
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dodo puzzle

Added year ago by tre

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lovely animals - cat talk with a dog
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lovely animals

Added year ago by Basiunia

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Animals - Misiek koala on the tree
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Added year ago by Grażyna

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Penguins

Added year ago by tatiana

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Added year ago by capitan

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Jigsaw puzzle

Added year ago by andi

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Added year ago by andi

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Added year ago by andi

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Added year ago by Jola

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Added year ago by andi

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Added year ago by andi

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Angry Birds

Added year ago by angrybird

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Angry Birds

Added year ago by angrybird

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Angry Birds - Players take control of a flock of birds trying to retrieve the eggs they have stolen from the evil
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Angry Birds

Added year ago by angrybird

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Angry Birds - Players take control of a flock of birds trying to retrieve the eggs they have stolen from the evil
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Angry Birds

Added year ago by angrybird

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Angry Birds - Players take control of a flock of birds trying to retrieve the eggs they have stolen from the evil
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Angry Birds

Added year ago by angrybird

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Angry Birds - Players take control of a flock of birds trying to retrieve the eggs they have stolen from the evil
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Angry Birds

Added year ago by angrybird

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Added year ago by Otek

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forester

Added year ago by pies

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PANDA PO - PANDA POPANDA POPANDA PO
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PANDA PO

Added year ago by PANDA PO

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Antarctica - Antarctica Antarctica
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Antarctica

Added year ago by antarktyda

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