...dropped defensively to the ground, lying flat and face-down. And then he cautiously turned over to face up, and saw that the metal-winged thing had just kept on going on into the distance. It hadn't really been flying AT him as overflying him, and he'd just happened to be looking into the hole in the ground the moment it flew out of it... seemingly right at him.
And a moment later, another one of the winged things flew out of the hole and headed off in the direction the other one had gone. This time he watched it with more detachment instead of startlement. It was a humanoid-looking thing, all shiny and metal, with something like condor's wings spread out from the back.
After a bit, he carefully went around to the side of the hole, looking for a way down that didn't involve sprouting wings of his own, and soon found what looked like a switchback trail going down the side of the opening. Pretty soon he lead the pack lizard along to that part of the hole, and started down it, where he saw...

