Gender locked race?

[Senn]

Ah, I saw this. I thought it was a sign of the other subrace 'Feol' Viera. Rather than the males. Feol's being a mix breed that doesn't follow the word of the wood. While the males of that sub-race weren't locked into guarding the wood. The race was 'wiped out' in tactics. Though that can easily be changed.

There have only been word of Veena and Rava viera, not Feol.

Beyond that, I honestly thought those were kits 'child' Viera - I couldn't tell if they were male or female, which makes sense with just how Viera young are. Can't tell the difference until they hit puberty; which would describe there's a lot more going on than just 'Ohh, private bits' I imagine it's mildly drastic - and very noticeable.

I think your mindset is more along the lines of the men having noticeable changes when they grow, right? It could be the opposite, and it's the women who have the noticeable changes as they grow. The change doesn't necessarily have to be drastic, either. A developed chest and curves, as well as the height difference, may be enough to tell male and female viera apart.

And while they may certainly add a cutie patootie sub-race - I see no reason why there can't be males in both categories - it would just be seen a lot less controversial for them not to be the 'males' of the main branch.

There could be tall and short sub-groups, but there also could be none. Like I said, the viera we saw in the trailer could be both sub-groups of viera (Veena and Rava), or just one sub-group of viera.