Complex sentence: The Mediterranean gull ("Ichthyaetus melanocephalus") is a small gull which breeds almost entirely in the Western Palearctic, mainly in the south east, especially around the Black Sea, and in central Turkey.
Split into simpler sentences: The Mediterranean gull ("Ichthyaetus melanocephalus") is a small gull. This gull breeds almost entirely in the Western Palearctic, mainly in the south east, especially around the Black Sea, and in central Turkey.