The DerpWings are a little known species, and they have a very small amount of tribe members. They are by far the smallest tribe in Pyrrhia and beyond.
DerpWings are multicolored like RainWings, but cannot change their colors. The have very oddly shaped faces.
In Book 15, it is noted that Tui SPECIFICALLY states that they DO exist. In Book 24, it is stated that Tui might allow Starflight to release a bit of info on them, but that is for a later time.