Aratus called Aquila the storm bird,, for in the northern
hemisphere it rises in winter bringing with it bas weather
and storms of that season. The constellation has been recognized
as a bird for the last 3.500 years and the greesk incorporated it
it in their mythology by naming it the eagle, whose form Zeus
assumed to kidnap Ganymede.
By it is the Bird [Cygnus] outspread nearer the North, but hard at hand another bird tosses in storm,
of smaller size but cruel in its rising from the sea when the night is waning, and men call it the Eagle (Storm-bird) [Aquila].
ARATUS OF SOLI was a Greek poet who flourished in Macedonia in the early C3rd B.C. His only surviving work is the Phaenomena, a book describing the constellations and weather signs.
Source: ARATUS, PHAENOMENA