Page 76 - World of Animals - Issue #36
P. 76

Birds that




                        c
          6 an’t fly



            Birds fly to migrate, search for food, or to escape predators but some

            species have found other ways to overcome these needs, rendering

            the need to fly useless

















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                                                                                                      Emperor penguin
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                          Kiwi i                                                                 The ability to swim has become
            The New Zealand icon is a nocturnal                                                 much more important than flying

            bird that uses its incredible sense of                                                 ever could be for this bird

                   smell to find its prey                                                         Penguins were able to fly many moons ago.

             The kiwi bird belongs to the genus Apteryx, the   Flightless cormorant             But over the years, a life spent on the ice and
             Latin word for ‘wingless’. Although they are the   This large water bird’s body is   swimming for survival has led to wings that more
             smallest ratite (non-flying bird family) member   perfectly adapted to diving and   closely resemble flippers. Their bones have also


             and have been sentenced to a life on the ground,   gliding through the ocean       changed; rather than having hollow bones like
             they do have tiny vestigial wings buried beneath                                  other birds, their bones have become heavier to


             their bristly feathers, leover from a previous life.   The flightless cormorant is the only one of 40   help them dive below the water’s surface.
                                                       cormorant species to have lost the ability to fly.

                                                      Also known as the Galapagos cormorant, a lack of
                                                      natural predators, all round good weather, and a
                                                     plentiful food supply means they have no real need

                                                       for flight at all. They also have webbed feet and
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                                                        powerful legs to power through the water.. r
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                                                                  Ostrich
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                                                       An ostrich’s kick can be lethal as
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                                                     they have some of the strongest legs
                             w
                       Cassowary                     they have some of the strongest legs                   Rhea
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                                                            in the animal kingdom
               The big bird with a dangerous                in the animal kingdom              One of the most powerful birds uses
             reputation that’s able to take down     Ostriches do not have a keel, which is a part of the   its wings as rudders
              dogs and humans with one kick          breastbone connecting the pectoral muscles to the   Native to South America, the rhea’s name comes
                                                      wings, and the structure enabling other birds to
            Being unable to take to the sky to avoid predators,   flap and take flight. However, even if ostriches did   from the Greek word for ‘ground’. It may seem silly


             the cassowary has learned to stand up for itself   have a keel, their tiny wings probably wouldn’t be   for a flightless bird to be in possession of wings,

              in other ways and the shy bird chooses fight   able to carry their large weight. They are certainly   but the rhea uses them for stability when running

           © Thinkstock; Getty  cassowary as the world’s most dangerous bird,   at no disadvantage; to compensate for the lack of   per hour. It is an impressive sight, as they run in a
                                                                                               at high speeds of up to 64.4 kilometres (40 miles)

               over flight in response to a potential threat.
              The Guinness Book of Records has named the
                                                      li, the largest bird in the world can run at speeds

                                                                                               zigzag pattern while liing alternate wings to act

                                                        of up to 70 kilometres (43 miles) per hour.
              thanks to their strong kick and sharp claws.
                                                                                                 as sails and to confuse potential attackers.
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       076_BirdsThatCantFly.indd   76                                                                                        20/07/2016   15:52
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