I know this is a longshot since I did not have a camera but here goes ...
We saw 2 identical birds soaring and chasing each other just above the tree line.
If I was in the Galapagos, I would have sworn they were miniature frigate birds judging by the shape of the wings and long thin tail. But they were too small for a frigate bird (and wrong continent in any event).
These were at least the size of a large gull, or maybe bigger than a large gull. Mostly white but maybe had some grey (not sure about that). The wings were unusual in that they had a very pronounced W shape and they were narrow (or frigate bird! yeah, I know its not, but its the closest I could come to describing the overall shape). The tail was also unusual - long and thin like a frigate bird when soaring. They were not Copper Hawks - tail was more narrow than a coopers, and wings were not the right shape for any hawk I have seen (plus, mostly white and no bars on tail).
Wingspan it was somewhere between 16" and 24" but hard to say exactly due to the fact that they were flying in and out a lot.
I am going to sit out and see if I see them again with my camera..In they meantime, any ideas what they could be?
Location: Northfield, IL
Date: June 24, 2020
Time: about 6pm