Every year approximately 6.5 million soaring birds migrate between Europe, Asia and Africa using two major flyways crossing Anatolia. 2 million storks and raptors fly over İstanbul while 1.2 million raptors pass from the Batumi bottleneck and enter Anatolia from north-east. Millions of ducks and geese also use these paths. Sadly large numbers of these birds are killed illegally and they also face other major threats such as electrocution, poisoning and collision with powerlines.
More info at: http://www.birdlife.org/europe-and-central-asia/news/help-us-tackle-illegal-killing-migratory-birds-turkey