I'm afraid he was speaking of folk such as myself, Brian, Arach, DoctorBill and other members here. We may be opinionated, may even have a few facts, but I don't know that we're experts.
But there is a weight of evidence that such creatures were either a generic critter of myth or poetic interpretations of common beasts. There is also a weight of evidence that they are not speaking of dinosaurs.
Aslan is not a Tame Lion