The barn swallows I remember had a brown belly, these have a light gray belly.That you are seeing are Barn Swallows. Purple Martins are one of the only birds that are dependent on human nesting structures.
do you have a bridge/culvert nearby?
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https://www.surfbirds.com/namericanbirds/purple-martin.html
My son was shooting pellet gun out of town at a buddies house, sure as shit the target (Pepsi bottle) he shot at had a pheasant about chest level ducked into the long grass. He hit it as the cock jumped into the air and squabbled off
The barn swallows I remember had a brown belly, these have a light gray belly.