Tagata rere is a rather arbitrary label, because Metoro said so only a few times when looking at this type of glyph.

Furthermore, the glyphs which I have collected as tagata rere are not very homogenous.

A few preliminary remarks and imaginations:

1. These are the tagata rere glyphs in G:

Ga1-7	Ga1-9	Ga7-13
Gb5-7	Gb5-8	Gb5-9	Gb5-11	Gb5-26

The first three of them look more as 'true' tagata rere than the following 5, I think; looking straight at us and birdlike in appearance. Maybe tagata rere means bird man?

The wings of tagata rere are shorter than those of manu rere:

tagata rere	manu rere

I imagine tagata rere hardly could fly. If tagata rere represents some kind of bird it must be a moa rather than a manu.

Interestingly, Metoro never mentioned moa at any of the total of 58 tagata rere glyphs he had opportunity to comment upon. There ought to be some intrinsic opposition between tagata rere and moa.

Possibly Metoro from the surrounding glyphs deduced that the tagata rere glyphs he encountered could not be moa. But if so, then tagata rere glyphs must occur only at distinct special occasions.

Another, and more plausible, possibility is that moa always must be seen with the upper part of their torso turned toward us - with two wings, kara, in view instead of one:

manu rere	moe	tagata rere	kara etahi	vae kore	moa