A creepy cry that sounds like a human voice, velvet black wings, the image of tearing into dead flesh; crows are known across the world as an ill-omened bird that flies down with ill-luck.
彼は13が不吉な数だという迷信を信じている。
He believes in the superstition that 13 is an unlucky number.
13日の金曜日は不吉な日だと言われている。
It is said that Friday the 13th is an unlucky day.