That really is absurd. The condition known as blepharospasm and hemifacial spasm are conditions that are genetic and cannot be helped. Why on Earth would you thinks its a bad omen? You sound like someone who's looking for ridiculously bad things even when they don't exist.
For their dark color and tendency to feast on carrion (especially after battles) crows are generally considered a bad omen
The superstition surrounding a twitching eye is believed to be a sign of impending good or bad luck, depending on which eye is twitching. It is thought to be a message from the universe or a higher power, and people may interpret it as a warning or a positive omen.
Black Cats
Yes most people consider a dead bird in the house as the sign of a bad omen. Birds are considered by some to be the harbingers of death.
The word omen is not a bad word
This can be a good or bad omen. If you don't like bees it is a bad omen however if you appreciate their role in nature it can be a good omen.
Left eye twitching in females can be a sign of stress, fatigue, or eye strain. It may also indicate a lack of sleep, excessive caffeine intake, or dehydration. In some cultures, it is believed to be a superstition or omen of good or bad luck. If the twitching persists or is accompanied by other symptoms, it is recommended to consult a healthcare professional for further evaluation.
In few customs like Thai and Japanese it is considered to be a good omen. But, in few societies it is not considered as a good omen. For further reading visit the related links.
It's not an omen it is carelessness or bad luck.
The story is you will die or suffer serious injuries. It's considered a bad omen.
In different societies and cultures, bats have been regarded by some as a "good omen" and others as a "bad omen".
Yes an Omen can come in many forms.