A number of biblical and non-biblical texts describe encounters with flying venomous snakes in the Sinai and Arabian deserts. Egyptian iconography may help clarify what is being pictured.One has to wonder what, if any, connection there is between the flying, burning (seraphim) serpents and the biblical angels called seraphim in Isaiah 6. Note 4 of this essay may hint that a discussion of this question is forthcoming.
A related essay by the same author was noted here.
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