Crows and Ravens
To my information, no bird is considered holy in Islam.
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 bird caused the death of the frog by eating it, but the bird's death was accidental and not intentional.
The turkey is considered a sacrificial bird in Mexico.
A black bird symbolizes death.
The kiwi bird of New Zealand is considered to have hair.
Bird
It is a perching bird (passeriform), and is considered a songbird.
I think a mourning bird symbolizes a death or sorrow.
egg, baby, adult bird, and death
Eagles because they are a sign of strength.
I suppose you could interpret it that way, since a bird tapping on a window is an omen of death.