Today i was in my back yard picking up raked leaves and putting them in bags and i founs this sort of ant that i had never seen before... I picked it up to look at it and i saw that it was thin black and had long straight pinchers. I put a blade of grass between the pinchers and when it snapped them shut, all i heard was a pretty loud click... There were a few of them and they seemed to live in colonies (some dont...) so what i ask is what kind of ant is this??