MARE - Marmara sea
"As air thermals don’t form over water, however, the storks would have to employ energetic wing-flapping to use such a route, a technique that burns 23 times more body fat
than soaring over land. "
"Instead, they cross over at the Strait of Gibraltar, where Europe and Africa are separated by a mere 7.7 nautical miles of ocean. The storks rise as high as they can over the southern tip of Spain, after which they “surf” above the sea at height before once again picking up the thermals over land in north Africa."
(source: http://www.bbc.com/earth/story/20160321 ... bird-wings
Gibraltar: 1 nautical mile = 1.85200 kilometers - 7.7 nautical miles = 14,2604km
Marmara sea: 8-10km (the narrowest point of the Istanbul Strait: 0,698km - https://goo.gl/images/TXJopg
- the Bosporus Strait is the preferred route)
cca 1 hour flapping
Mare flew over the Kapıdağ Peninsular in the mid-Marmara Sea