The BBC reports that there are rat-eating snakes in Wales after 10,000 years out of UK.
Are the snakes an omen?
Quotes below are from two different sections of the article titled Serpent (symbolism) in Wikipedia.
“The serpent, or snake, is one of the oldest and most widespread mythological symbols. The word is derived from Latin serpens, a crawling animal or snake. Snakes have been associated with some of the oldest rituals known to mankind and represent dual expression of good and evil.
In some cultures, snakes were fertility symbols. For example, the Hopi people of North America performed an annual snake dance to celebrate the union of Snake Youth (a Sky spirit) and Snake Girl (an Underworld spirit) and to renew the fertility of Nature. During the dance, live snakes were handled, and at the end of the dance the snakes were released into the fields to guarantee good crops. “The snake dance is a prayer to the spirits of the clouds, the thunder and the lightning, that the rain may fall on the growing crops.” To the Hopi, snakes symbolized the umbilical cord, joining all humans to Mother Earth. The Great Goddess often had snakes as her familiars—sometimes twining around her sacred staff, as in ancient Crete—and they were worshiped as guardians of her mysteries of birth and regeneration.”
“In the Hebrew Bible the serpent in the Garden of Eden lured Eve with the promise of being like God, tempting her that despite God’s warning, death would not be the result, that God was withholding knowledge from her. Although the serpent is identified as Satan in the Book of Revelation, in Genesis the serpent is portrayed merely as a deceptive creature or trickster, promoting as good what God had directly forbidden, and particularly cunning in its deception (Gen. 3:4–5 and 3:22).
The staff of Moses transformed into a snake and then back into a staff (Exodus 4:2–4). The Book of Numbers 21:6–9 provides an origin for an archaic copper serpent, Nehushtan, by associating it with Moses. This copper snake according to the Biblical text is put on a pole and used for healing. Book of Numbers 21:9 “And Moses made a snake of copper, and put it upon a pole, and it came to pass, that if a snake had bitten any man, when he beheld the snake of brass, he lived.”
When the reformer King Hezekiah came to the throne of Judah in the late 8th century BCE, “He removed the high places, broke the sacred pillars, smashed the idols, and broke into pieces the copper snake that Moses had made: for unto those days the children of Israel did burn incense to it: and he called it Nehushtan. (2 Kings 18:4)”