What are some animals with ominous/mysterious connotations?
I'm trying to think of a street name for a character for a book I'm writing. The character is a hitwoman, but no one knows the identity of the hitwoman or even that it's a woman at all. But the people in the region know of this hitperson, that they stand and watch you while you are completely unaware and plan for when they strike. No one ever sees the hitwoman but they know when she strikes the next day and they all whisper this street name in fear.
Non animal names appreciated too