Driving home from grocery shopping on a country road, I started to see a large bird flying. I hadn't seen it before. It was in the distance, but looked light on the bottom and had light wings with black on the tips. I looked it up and saw an image of a male harrier that looked like it. It floated up and down, across the fields. I read that males can sometimes give a mating call that sounds like a gull. I heard what I thought was a killdeer, but couldn't see one. Have any of you ever heard this call? Would it sound like a killdeer? I hope I see one again. It was the first time for me.