Socially, Vrygans resemble ants, bees, wasps, and termites... although possibly without a 'queen'.
(On the other hand, possibly maybe. Insect 'queens' refers not to regency, but to the fact that one 'queen' is the mother of all the members of a hive. For example, there are probably a trillion or so bees on Earth, all descendants of only ten or twenty million queens.)
Physically, Gates has always reminded me of the
larva of the Japanese Silk Moth, which means that Vrygans would have evolved from some distant prehistoric giant moth-man ancestor through some neotenic process.
Neoteny: Also called pedogenesis. The production of offspring by an organism in its larval or juvenile form; the elimination of the adult phase of the life cycle.Gates' face is very birdlike, and he has that torso and those upper arms, so, yeah, something of a centaur-like composite.