Also, interesting to note, the DMG listed NPC stats for Aaracocra as +2 Dex, +2 Wis, but when it became a playable race it was nerfed to +2 Dex, +1 Wis
Dwarf NPC is listed as +2 Str or Wis, +2 Con.
So with that in mind, logic would dictate that one could make a variant of Dwarf or Aaracocra...