Had a guy tell me as a kid, when the went to town they circled the roadkill with chalk. Then on the way back the picked up anything without a circle.
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Knew a guy in Mississippi whose grandfather worked at Ingalls shipyard in Pascagoula. He lived in about an hour north of the coast. On the way to work, he mark any roadkill with a circle of spray paint. On the way home after a 12 hour shift, he would pick up any that had not been picked up by scavengers and take it home and clean it. He said they would throw whatever they had in a pot and cook it for a while...Roadkill Stew...