Wyvern folklore is rarely fire-breathing like the four-legged dragon. Sometimes modern fantasy book and media authors have wyverns that are frost-breathing or poison-breathing instead of fire-breathing. The current spelling "wyvern" is not attested before the seventeenth century as "winged two-footed dragon". According to the Oxford English Dictionary, it is an alteration of Middle English "wyver" (attested thirteenth century), from Anglo-French "wivre" (cf. French "guivre" and "vouivre"), which originate from Latin "vīpera", meaning "viper", "adder", or "asp". Conversely, medievalist William Sayers proposes a more complex origin for the term. He notes that the Anglo-French "guivre" and its Middle English derivative ceased to
Heraldry Italy is characterized by a lack of crests, and uniquely shaped shields. Portuguese heraldry, however, does use crests. Portuguese and Spanish heraldry occasionally introduce words to the shield of arms, a practice usually avoided in British heraldry. Latin heraldry is known for extensive use of quartering, because of armorial inheritance via the male and the female lines. Moreover, Italian heraldry is dominated by the Roman Catholic Church, featuring many shields and achievements, most bearing some reference to the Church. Trees are frequent charges in Latin arms. Charged bordures, including bordures inscribed with words, are seen often in Spain. Eastern European