Place: Grotta di Nettuno, Sardinia, Italy
Date: 19 June 2017.
[Tachymarptis melba, Family Apodidae, Order Apodiformes, Wikipedia Entry: Alpine swift]
The sound of the Alpine swift (borrowed from the Xeno-Canto website, recordist Vincent Pourchaire)
Distribution of the Alpine swift across the British Isles (borrowed from the Bird Atlas Mapstore).
Marnix's Bird Gallery 