Link to this photo:

This photo is copyright protected and may not be used in any way without a proper permission.
click to view full size image

Airline: Turkish Airlines
Aircraft: Boeing 777-F
Place: Helsinki - Vantaa (HEL / EFHK), Finland
Date: 2020-05-08
Registration: TC-LJT
Photographer: Samuli Viikari
Remark: (cn 66580/1645) Black stripes on the sky is actually huge flock of migrating barnacle goose