A duck's quack doesn't echo. Emus and kangaroos cannot walk backwards, and are on the Australian coat of arms for that reason.
Cats have over one hundred vocal sounds, while dogs only have about ten.
Camel's milk does not curdle. An animal epidemic is called an epizootic. Murphy's Oil Soap is the chemical compound most commonly used to clean elephants. The United States has never lost a war in which mules were used. All porcupines float in water.