Page 43 - World of Animals - Issue #31
P. 43

Giraffes: standing tall

              The height of                                                                                    Ossicones

                                                                                                               Male and female giraffes both
              sophistication                                                                                   grow horn-like ossicones that
                                                                                                               are made of hardened cartilage
                                                                                                               and covered in tu y skin.

              Living in the savannah requires
              unique adaptations, some of
              which might not be as obvious
              as their striking necks



                   Necking
                   Male giraffes fight for the right to                                                         Tongue
                   mate and assert their dominance by                Nostrils                                 Giraffes have black or purple
                   ‘necking’, which involves swinging                If the weather kicks up                  tongues; the dark colour is
                   their heads and necks at each other.              a dust storm, giraffes                    likely to protect them from
                                                                     can voluntarily close                    suffering from sunburn.
                                                                     their nostrils to protect
                                                                     themselves from
                      Bending down                                   unwanted intrusions.
                      Giraffes may have long necks but                                                         Fur
                      they’re still not quite long enough                                                     No two giraffes have the
                      to reach the ground without some                                                        same pattern of patches
                      rather ungraceful leg splaying.
                                                                                                              on their fur. It is as unique
                                                                                                              as a fingerprint and makes
                                                                                                              individuals easy to identify.




               Standing                                                                                 Kicking
               Giraffe calves are able to                                                                If it feels threatened, a giraffe
               stand up within an hour                                                                  will kick out with its back legs
               of being born and adult                                                                  with enough force to seriously
               giraffes spend the rest                                                                   injure or even kill a lion.
               of their lives standing.























                                     The evolution
                                     of the giraffe






                                                                                    Inherited traits
                                       Natural selection                            A er many generations, there
                                       Early giraffes show variations in neck        are still variations in height
                                       length and in this environment longer        but the group demonstrates a
                                       necks are an advantage, so they are          general increase in neck length.
                                       favoured by natural selection. This          This process continues until the
                                       long-necked characteristic is passed         necks are as long as those of
                                       down to descendants.                         modern day giraffes.



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       040-045_Giraffes.indd   43                                                                                            02/03/2016   14:26
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