As a whole I like what you have created here, nicely balanced with lots flavour. The only thing I would change is the highflyer trait. Just make it so you can fly, there isnt any need for all the penalties to it especially when the official aaracokra race doesnt impose penalties while flying and the only downsides being that you cant fly in heavy or medium armour.
Fix that feature and maybe add in a few more breed traits for that bit more variety and id say you have a well made race that I would allow in my games
[4 of 5 Stars!]