We have never seen any bird flying over the Ka’ba nor seen any airplane flying over the Ka'ba. Allah Knows the secrets behind it. No doubt, Ka'ba is the first holy place on this earth as Allah (SWT) mentioned in Quran: Verily, the first House established for mankind was that at Bakkah ( Makkah), full of blessings and guidance for all worlds.(Sura 3, verse 96).
'Ka'ba has secrets and signs which are not known to public.
Wassalam.