Firefly

Many tribes held the fire-fly, which thrives in moist grasses, to be a typical emblem of our divinity. Its periodical flashing in the dark is suggestive.
The Logia and Revelation both yield data on the theme of fire. At the first angel's trumpet message there ascended on the earth a hail of fire which was scattered from the Altar of Fire before the throne. "And the hail of the fire was mingled with the blood of the Lamb; these were cast upon earth to consume away its evil."

Horus had said that he came to put an end to evil. At the second angel's blast lightning flashed forth and u/ent down into the sea, which it changed into blood. We have seen that a hail of stars or sparks over the earth was the typical figuration of the descent of the bright deities.

The Egyptian ceremony of flinging a blazing cross into the Nile conveys the same connotation. The deities in incarnation were styled by the Greeks water-nymphs. A cross on fire thrust into water carried the purport of the sacrificial act of incarnation. A fiery serpent on the cross is a kindred emblem. The Targum commands: "Make thee a burning."

In India the swastika cross was a special emblem of fire, the god Agni. In the early Church the cross of fire was adored on a Friday, when a lighted cross was suspended from the dome of St. Peter's, the cross being covered with lamps in a fire-traced figure. Dante describes the souls in Paradise as praying inside a cross of fire, which is their world. The hawk is a symbol of solar fire, and Horus arose hawk-headed or divinized with fire.
Alvin Boyd Kuhn. The Lost Light An Interpretation Of Ancient Scriptures (Kindle Locations 5940-5943).