I found lots of small black "crunchy" flying bugs in my bathroom tonight what could they be

I found lots of small black "crunchy" flying bugs in my bathroom tonight what could they be

Any of half a dozen species of flies or half a hundred species of beetle. Can you post a picture?

If not, catching a few and taking them to get them identified is your best option. A Biology department at a local college, the county agricultural extension office, or a large exterminating company office should be able to I.D. them for you.