Page 65 - The Miracle Of Talking Birds
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                   Birdsong is usually heard in spring, whereas the calls, much
               simpler than songs, are used by both sexes and heard throughout
               the year. Birdcalls allow swift communication via simple messages
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               without a great expenditure of energy. These calls’ main functions
               can be listed as follows:
                   - to establish a bird’s species
                   - to indicate the bird’s gender
                   - to show its location
                   - to demarcate and defend a territory
                   - to advertise a source of food
                   - to let young birds recognize their parents
                   - to keep the flock together
                   - to warn of the presence of an enemy
                   - to intimidate an enemy














                            SILENCE            HEARING AND SINGING OF
                                               SONGS











                          HEARING ONLY            SINGING ONLY

                  The photographs above show the areas of the brain activated during
                  hearing and singing in the canary.



                               The High Level of Consciousness
                                 in Birds that Imitate Sounds
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