Since the 1990s, lime-green parrots and parakeets have called the sprawling metropolis home. But for Istanbul’s winged denizens and birdwatchers, they are guests that have overstayed their welcome. For hundreds of years, Istanbul has been a haven for migratory birds and the avid bird watchers who hope to catch glimpses of storks, Egyptian vultures, eagles, hawks, wagtails, finches, goldfinches, bee-eaters and other special species as they make their way to ...