Population Migration / Travel
When the Empire of the Kolloh Twins collapses in 403 ET, many Aarakocra, Kenku, and Air Genasi flee through the remaining portals, into the Material Plane. Some travel to the surface, but many flock to Nisr, asking their long-lost kin for help.
This represents the first mass entrance of Kenku and Air Genasi to Nataya.