a needle in a haystack
needle in a haystack
Something that is very difficult to locate. Trying to find my contact lens on the floor was like looking for a needle in a haystack.
a needle in a haystacksomething that is almost impossible to find because it is concealed by so many other similar things.
2002 New York Times Magazine Terrorists don't fit a consistent profile: you're looking for a needle in a haystack, but the color and shape of the needle keep changing.