A small bird - Sibley says .28 oz. Okay, it is a really, really tiny bird. Every time I take pictures of flitty little birds I feel I have to apologize for the quality. The pictures are always a little fuzzy and the damned things just won't hold still to really square up on them. I should maybe have hit it with flash, but that seems a little invasive. And it was all I could do just to get it in the viewfinder and pull the trigger.