The gargoyles we see in some architecture are the artistic renderings from descriptive accounts. These are no different than the artistic illustrations of the space aliens that many describe today. Both are the artist’s composite from someone’s “encounter” with something. The similarity between the gargoyle of the past and the little grey men from outer space can be attributed to people describing the same type of being. One could speculate what the people are really describing could be a Seraph, (Isaiah 6) the serpent like being that is usually associated as being a demon. Believers need to be cautious when presented with “proof” of some obscure nature, don’t compare the Bible to what you are being told — compare what you are being told to the truth in the Bible.