A mixture of a buffalo and a beetle!
This particular kind lives in trees but cannot quite fly to get from branch to branch, so instead its bulbous body that inflates with lighter than air gas to help it float to get where it needs to be!
In case you get this little fella mad, watchout! When threatened, Buaglos inflate a much higher amount of gas than normal, and expel it to propel themselves, with their sharp horns forward, into an agressor!