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
Wyvern the coat of arms of the Tilley family. The kings of Aragon of the House of Barcelona since Peter IV used a wyvern as a crest on their helmets. Nowadays this symbol has been officially adopted as the coat of arms of the Generalitat Valenciana (Valencian Parliament and Government). The arms of the Worshipful Society of Apothecaries depict a wyvern, symbolising disease, being overcome by Apollo, symbolising medicine. The wyvern is also a fairly popular commercial logo or mascot, especially in Wales and what was once the West Country Kingdom of Wessex, but also farther afield in Herefordshire and Worcestershire,