Charge (heraldry) others, but the most frequently occurring of these are various forms of dragons. The "dragon", thus termed, is a large monstrous reptile with, often, a forked or barbed tongue, membraned wings like a bat's, and four legs. The "wyvern" and "lindworm" are dragons with only two legs. The salamander is typically shown as a simple lizard surrounded by flames. Also notably occurring (undoubtedly owing much of its fame to Napoleon, though it also appears in much earlier heraldry) is the bee. Animals' heads are also very frequent charges, as are the paw or leg ("gamb") of the lion, the wing
Mexican heraldry of these rules is a key to the art of heraldry. This system was adapted to Mexican society by incorporating flora and fauna native to Mexico. Another conspicuous difference between Mexican heraldry and European heraldry is the absence of a helm surmounting the shield. Most traditions of Mexican heraldry came from Hispanic or Spanish origin from regions in Spain or Portugal, predominating heraldry of Castilian, Basque or Galician, in second place heraldry of Catalan and Valencian origin. Other common heraldic traditions in Mexico came from French, Italian, German and Polish origins. The most recent heraldic influences, since 1943, are of