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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

high fly by (1 Viewer)

Yep, Greylag geese. Difficult to see in this picture, but there is this contrast on the underwing; between the small feathers on the arm (greyish-white) and the big flight feathers (dark). Taht is typical for Greylag goose, the other grey geese have all dark underwings flight feathers and small feathers (sorry, don´t remember the english terms for these feathers at the moment).

Jörn
 
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