Characteristics
In the Avatar franchise, Appa is the last known living sky bison, which are large mammal-like creatures that fly through airbending and steer through air currents with their broad tails. The bison are covered in thick white fur with a large brown arrow marking that is remarked to be extremely itchy. In the show, the markings on the flying bison's backs are what inspired the tattoos which symbolize an Air Nomad's mastery of Airbending. Their fur is shed at the end of winter. The Air Nomads summon the sky bison to their side through the use of whistles that only the animals can hear. Aang and friends use the words "yip yip" to get Appa to take off into the air.
Like all animals in the Avatar series, Appa cannot speak.
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