What is the title of the story about farm animals who form a band?

The Bremen Town (sometimes hyphenated) Musicians. it is not restricted to farm animals, a sort of moving statue thing in Central park has a Hippopotamus as one of the bandsmen. they were an animal musical group , that is essential to the plot. The moving statue thing, is the Delacorte Clock which goes off on the hour to the tune of(Take your choice, they are the same song) Bless This House or the ABC song.If your in Central Park when it sounds off- enjoy ! look towards the children"s zoo, the animals march about a sort of conveyor belt.-literally around the clock- underneath it.