Wyvern is made between the two. Since the sixteenth century, in English, Scottish, and Irish heraldry, the key difference has been that a wyvern has two legs, whereas a dragon has four. However, this distinction is not commonly observed in the heraldry of other European countries, where two-legged dragon-like creatures being called dragons is entirely acceptable. In the modern fantasy genre, there is little differentiation between dragons and wyverns, with two-legged, magical reptilian creatures all likely to be referred to as "dragons" without any differentiation between types. Wyverns, when present as creatures distinct from dragons, tend to appear as less magical
Westland Wyvern "Albion" until March 1955 when the problems had been resolved. 830 Sqn. took the Wyvern into combat from HMS "Eagle", flying 79 sorties during Operation Musketeer; the armed response to the Suez Crisis. Two Wyverns were lost to damage from Egyptian light anti-aircraft fire; both pilots of the aircraft successfully ejected over the sea, and were picked up by "Eagle"'s search and rescue helicopter. The squadron returned to the UK on "Eagle" after this conflict and disbanded in January 1957. Consequently, 813 was the last Wyvern squadron, disbanding on 22 April 1958. All Wyverns were withdrawn from service by 1958: