You know what I havn't heard anyone talk about yet?
The fact the Rito use what look like their own simplified version of compound bows.
So - for anyone who doesn't know archery, there's different types of bows you can use. The type you'll usually see in media is a long bow. (There's also flat bows, recurve bows, crossbows, etc.)
A compound bow is a more modern bow - and the most common type you'd probably use now days if you joined an archery club.
You can see the familiarities - the wheels, the supports, the shapes. The Rito bows are like a wooden version.
So why is it interesting? Well - they made the design choice to chose a more modern bow style rather than a more traditional one like a longbow dispite the fact the enviroments aren't modern. So this was a very specific design decision they made.
Why are compound bows more commonly used now days? Because they take less strength to pull and fire. Simple as that. To shoot a long bow, you need very good upper arm strength. Compound bows distribute the pressure to make them easier to wield if you don't have that.
Birds have hollow bones so that they can fly, and the Rito warriors seem to mostly have slender builds for dexterity. The liklihood is that they don't have incredible muscle strength. So using compound bows makes perfect sense. They can also be lighter, because a long bow or a flat bow must be made of a solid piece of wood so it can bend without breaking, but a compound bow is usually made from hollow pieces of metal (though theoretically could be made from wood), because they don't have so much pressure on them. So they'd be able to be flown around with much easier.
This probably isn't of any interest to anyone, but it was something interesting I noticed that I wanted to share!