Super_Mapper
(as stated in disc; )
(This could be changed so to make their enhances more realistic, for example make them heavier, so that they sink faster in water and stuff. It gives realisim to the resistance and stronger bones, whilst also maybe making sense of the air-sack.)
(And with their seemingly better sight and sences, make them have visionary and sensory problems more, making them in greater need of artificial supports such as glasses. Though it doesnt have to be "all of them need glasses" it can just be "the risk for visionary problems are bigger than that of humans, maybe not hugely so, though still better.")
(and this is just a suggestion, yeh can make them only slightly heavier, or whatever, just make 'em have some weaknesses so they dont feel imbalanced to people who just started reading yer thing.)