I was out with the ducks tonights and I noticed all 3 of them have these little black and grey insects on them, from what I could tell mostly around their faces. I would say 2-4 bugs per duck that I could see. These are small flying insects. They are not fleas or ticks (I think. Have never seen a tick up close but I looked it up). When I brushed them away most would fly off but one was right next to the duck's eye and I had to pick it off. There was a tiny pinprick of blood where the bug had been, like it was biting the duck's eye. Does anyone know what this would be and how I can get rid of them? I know diatomaceous earth is supposedly good for fleas. For background, it's been really hot and humid here for the last week, and all the bugs have been bad, especially mosquitos. Thanks for your help!