Fall hawk migration is a pretty spectacular event in eastern Colorado. Large numbers of hawks stop-over in fields to feed on insects, often large numbers of grasshoppers. Though I've seen groups of hawks in native grassland as well as agricultural fields, this year they have all been in ag fields likely due to the severe drought conditions that has plagued southeast Colorado all summer (though there have finally been some recent rains have mitigated drought ratings). In the top pic only one hawk remains in the field as others have taken off and are flying in the background (all those little black dots are flying hawks).
The bottom pic shows a larger number of hawks that are in a 'kettle'--that is a group of hawks that are circling as they rise on a thermal. Again, all those black dots are hawks SeEtta
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