Flying bison

Flying bison, also known as the sky bison, lived in the air temples along with the Air Nomads, and were supposedly the only way to reach an air temple prior to the Hundred Year War. The most notable flying bison was Appa, Avatar Aang's animal guide and major means of long-distance transportation. The flying bison are regarded as the first airbenders and were highly respected by the Air Nomads, who believed that once they had chosen a bison, it would be their lifelong companion.

Anatomy
Flying bison have five stomachs, flat, beaver-like tails, brown eyes, shaggy, white fur and a brown stripe that runs along their back, from tail-tip to forehead, where it terminates in an arrowhead. They have six legs with three toes on each foot. A fully-grown flying bison can easily weigh ten tons. They are revered by the Air Nomads, whose tattoos deliberately emulate their arrow-shaped markings, for inspiring the airbending art, similarly to how badgermoles inspired earthbending and the dragons with firebending.

Connection
A flying bison is a hybrid between a bison and a manatee. The real life bison shares a similar history to the flying bison, in that they were a very abundant species until foreigners came and hunted them down, reducing their numbers to near extinction. Both have also been commonly misidentified as a buffalo.

Tamed behavior


All flying bison can use airbending to fly, utilizing their broad tails to steer through air currents and also to defend themselves. They are also able to use their mouths and possibly their noses to airbend. Though fairly docile, these creatures can be fearsome when aroused to fight, as is exhibited by Appa in many cases. These creatures were the main means of transportation for Air Nomads. It was customary for young Air Nomads to choose a flying bison to be their lifelong companion. Aang chose Appa at the Eastern Air Temple when he was a young child, by giving him an apple. In the Northern Air Temple, airbenders held championships for bison polo. This game was played in the air; as airbenders rode their bison, they tried to force the ball with their polo mallet into an opponent's goal. To direct his flying bison Appa to take flight, Aang uses the command "Yip-yip". To summon one from a far location, one may use a bison whistle. A sky bison whistle is used the same way as a dog whistle, which blows at a frequency that can be heard by humans but seems very quiet. It alerts the bison and sends it to its caller.

Trivia



 * Sky bison are usually comfortable in the air, hence their reputation and their name.
 * The circus master called Appa a "Wind Buffalo".
 * During San Diego Comic-Con, it was revealed that Avatar Aang found a whole new herd of sky bison. The new subspecies has a few differences, for example: old bison had four transversed strips plus the last one, that lies at the end of the tail, whereas the new species has more strips that are thinner. The new bison also have brown fur on their ears instead of white.
 * The movement animation of the flying bison was heavily influenced by the similarly-shaped multi-legged Catbus in Hayao Miyazaki's movie My Neighbor Totoro. The series' creators have professed their fandom of Hayao Miyazaki in many interviews. Also, in the book "Art of the Animated Series" it is shown that the original design of flying bison more closely resembled sea manatees.