It depends with the type of bird entering the Hindu home. A dove entering a Hindu home is usually considered good omen whereas an owl is usually considered a bad omen.
Nothing happens. As per Hindu mythology that was a sign of good omen for men and bad for women. Reverse was true for left eye brow.
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.
It's not an omen it is carelessness or bad luck.
In different societies and cultures, bats have been regarded by some as a "good omen" and others as a "bad omen".
It's a death omen
A black cat is bad luck. If one crosses your path, it's a bad omen.
For their dark color and tendency to feast on carrion (especially after battles) crows are generally considered a bad omen
Yama or YamaDharmaraju is the god of dharma. He is also the head of narak where people are punished for their bad karma
It is not any kind of omen.
Yes an Omen can come in many forms.