Every culture turned birds into omens independently. The reason isn't symbolism. It's what birds actually are, and what they actually witness.
Birds as Omens: The Dark folklore
Magic vs. Magick: Why the Silent Letter Matters More Than You Think
The k in "magick" isn't a philosophical stance. It's a password Aleister Crowley wrote for himself, and the occult world has been reciting it ever since without asking who it was meant to keep out.