Dirt Nap takes the not so subtle hint and flies away, using the native agility of the owl form to fly below the tree line, being careful to avoid allowing a direct line of sight back to the boats across the river. It would be an unnatural feat of marksmanship for anyone to actually hit him with a shot from a handgun at such a great distance, but he doesn't chance it nonetheless; 'unnatural' being the word for the whole night, after all. He makes sure there are solid trees or other obstacles between the Raiders on the other shore and his feathered back!
Dirt Nap is trying to disengage and fly out of the scene as cautiously and safely as possible; figuring he's got as much intelligence as he's able to get and still reliably report back with it.