Once upon a time, GS typed the following...
"Well, my tradition holds that one of the ways in which the Gods communicate with people is through omens, birds being one of the more frequent examples. Then again, its from a rather specific cultural tradition, so take from that what you will."
So, regarding omens:
Are they personal, cultural, universal?
Objective or subjective?
Empirical?
Is there a science of omens?
Thank you for sharing your views.

(I posted this in the debate area in case there is some disagreement, but I won't be offended if the moderator would like to move it to the learn-about area.)