ギーヴルは、蛇のような長い体と竜の頭を持っていると言われていた。後足はあっても目立たない。また、ギーヴルの額には角があったという記述もある<ref>Rose, p159</ref>。地元フランスでは、非常に攻撃的な生き物として知られ、時には挑発されなくても襲ってくることがあった<ref>Rose, p159</ref>。ギーヴルは、裸の人間が怖くて、顔を赤らめて目をそらしていた<ref>Shuker, 2003, p17</ref>。ヨーロッパの資料では、池や湖のような小さな水域、森林、湿った場所などに生息していると示されている<ref>Rose, p159</ref>。
== La Guivre ラ・ギーヴル ==
[[Samson of Dol]] was present at an encounter between a small dragon-like creature (known as "La Guivre") and a priest. Samson had come to visit Saint Suliao with an entourage of followers. Suliao was impoverished but sought to provide a meal as best as possible for the group. One priest, uneasy with the low quality of food, took a bread roll and hid it under his robe. Almost instantaneously he started convulsing and Suliao pulled apart his bosom, seeing what the man had done. He admonished the priest and removed a hideous serpentine creature from the robe. There he [[exorcism|exorcised]] it and then compelled another man to throw it from the roof of a building in Garot.{{sfn|Dickens|1864|p=319}}