The Isle of Manx Cat flag is for the Manx Cat, which originated on the Isle of Man. The Isle of Man is famous for its tri-skeleton flag. It seems only appropriate that its most famous native gets a flag of its very own. The Manx Cat flag has sky-blue background and features a three legged tabby coloured cat.
The Manx Cat is a cat with little or no tail like a bunny, but some do have tails indeed, see the video below. The three legged Isle of Manx Cat flag is based upon the three legged symbol for the Isle of Man, the official arms with legs (a would be coat of legs) is supported by a Peregrine falcon on the left and a Raven on the right.