He had no idea who they were, except that sightings of them became regular soon after the nuke attacks on the East Coast.
I think what they are actually saying is that there have been no confirmed sightings of animals other than feral ones.
The search for the motor home is broadening out but so far, no sightings.
Wildlife sightings may include bald eagles, beavers, moose, and bears.
The sightings have raised fears that little is being done to enforce the ban.