Edward the Emu by Sheena Knowles

Edward the emu was sick of the zoo,
There was nowhere to go, there was nothing to do,
And compared to the seals that lived right next door,
Well being an emu was frankly a bore.

Tired of his life as an emu, Edward decides to try being something else for a change. He tries swimming with the seals. He spends a day lounging with the lions. He even does a stint slithering with the snakes.
   But Edward soon discovers that being an emu may be the best thing after all. And so he returns to his pen, only to a big surprise awaiting him . . .