I’ve seen the Articuno at least three times, and Zapdos once before. Also never seen the Moltres.
Here two other threads about the Articuno:
www.elitefourum.com/t/english-non-cracked-ice-aritcuno-ex-fire-red-leaf-green/16766/1
www.elitefourum.com/t/ex-fr-lg-legendary-birds-ex-cosmos-holo-error-misprint/20646/1
@regigigagod Joe has a pretty cool miscut of the error as well 
Greetz,
Quuador