Page 83 - One Million Things: Animal Life - The Incredible Visual Guide
P. 83

3  BETWEEN SPECIES                           5  HEAD ON                                   7  WARNING CALL
          In the African savanna, when an animal dies or   At the start of their breeding season in the fall,   In the fall, male red deer round up females to
          is killed, vultures crowd around the remains,   male bighorn sheep have head-butting     prevent them from mating with other males.
          fighting among themselves for scraps. When   contests. Two males run at each other, ramming   They roar at their rivals, the loudness of their
          scavenging hyenas arrive, the vultures scatter,   their heads together. This can go on for hours   bellowing indicating their fighting ability.
          returning to the carcass to feed warily in the   until one male gives up. The overall “winner”   Roaring alone may ensure a stag’s success, but if
          presence of these powerful carnivores.      within the herd mates with the most females.  not, he locks antlers with rivals and fights.



          4  STAG BEETLES                              6  DECLARING TERRITORY                       8  ON THE BEACH
          With their massive jaws it might appear that   Songbirds do not sing to give us pleasure but   During their breeding season, male elephant
          male stag beetles catch large prey. In fact, they   to tell other members of their species to keep   seals strive to command the largest territory
          feed on tree sap and use their jaws to fight other   out of their territory. European robins, for   and the most females. Initially, a male makes
          males for mates and favored mating sites. The   example, defend the territory that supplies   booming noises to intimidate rivals. If that
          winning male lifts an opponent and turns him   them and their offspring with food. Persistent   fails, the enormous creatures fight on the
          onto his back. The loser then retreats uninjured.  intruders are attacked and driven out.   beach, inflicting wounds until one retreats.







                         Antlers
                         used for                                                          Competing male
                         fighting                                                          seals bite and
                                                                                           push against
                                                                                           each other

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                                                                                                    9   LIZARD THREAT
                                                                                                   Many lizards change color or perform some
                                                                                                   other display when their territory is threatened.
                                                                       9
                                                                                                   A male green anole flicks down its pink dewlap
                                                                                                   (throat fan) to warn off intruders. It emphasizes
        Beak opens wide as the                                               Pink                  the message by bobbing its head up and down.
        European robin sings to                                              dewlap
            defend its territory                                             exposed as
                                                                             a threat

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   US_080_081_competition.indd   81                                                                                                 17/12/08   15:24:50
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