A "kettle" of Broad-winged Hawks, rising on a thermal of warm air.
Yesterday we were thrilled to see over 4,000 hawks, mostly Broad-winged Hawks, go over Pack Monadnock Raptor Migration Observatory, NH most in a few hours, from 10 am to 12 noon. That was the second highest daily tally ever recorded at Pack. The flight was dense and right over our heads, like a river of birds that would flow, then "kettle" (rise as a group on a thermal of air) up, then more birds would flow in. These broadwings are on their way to Central and South America.
So exciting to see! Go to your local hawkwatch site.