[Dead Dog]

RAF Lancaster

Lilly White British Men posing with RAF Spitfire (probable naked chick nose art).

I couldn't find a image of it, but the IIRC an RAF P-51 squadron had the "tiger shark" teeth thing going. I guess that makes them criminally insane.

[Oztrich Boy]

A nation that can allow those faces to be painted as an image on its national aeroplanes has regressed into unimaginable irresponsibility. A nation that can paint those faces on death machines must be insane.

That would be the United Kingdom of Great Britain, Northern Ireland, and Berwick-upon-Tweed.

The best known P-40 unit was the American Volunteer Group in China, the "Flying Tigers". The famous shark-mouth decoration on their aircraft actually originated with the RAF in the Western Desert.

RAF 112 Squadron

Also Royal Australian Air Force Squadron 457 with Spitfires

16 Squadron RAF with Canberras

Royal Navy Sea Vixen <(and) RAAF Taylorcraft Auster MkIII

And I believe that some Americans have also used the motif

[F-117A]