Imagine intelligent yet shy faerie the size of a tennis ball capable of vertical takeoff and landing (VTOL) are planning a mass migration from Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch, UK to their mating ground in Krung thep mahanakhon bovorn ratanakosin mahintharayutthaya mahadilok pop noparatratchathani burirom udomratchanivetmahasathan amornpiman avatarnsathit sakkathattiyavisnukarmprasit, Thailand. The main flocks can easily make this intercontinental trip within 2 to 3 months with fewer rest generally lasts upward of 12 hours, smaller flocks have been found at many hotspots across the Asia and Europe and sometimes Africa.
Their flight ceiling is around 100m above sea level normally but in this mass transmigration they can push their limits to 10,000m unaided! Biologist discovered their blood has extremely high amount of haemoglobin which explains why they could metabolise with such thin air at higher altitudes.
Traditionally they would rely on the quantum entanglement to sense Earth's feeble magnetic field and an old hand drawn map for navigation, however recent studies had indicated that many faerie are using our road line map instead. I have been wondering how could their innate natural compass be compatible with our current Google map (a paper map indicating all the existing road lines)?
P.S. Faerie are non tech savvy/ computer illiterate if you will.