The biggest numbers of Broad-winged Hawks went over Pack Monadnock on Thursday 9/18. At one point, we had a kettle of 300 plus broadwings with another several hundred behind them.
There were so many, Ian looked out and said "the sky is black over Pack Monadnock." You have to image the above broadwing photo multiplied many times.
At other times, the hawks were so close the above crowd (Don is in the center in blue) were treated to "naked eye" birds. That's a hawk watcher term for close birds.