Lake Kerkini is now one of, if not the, premier birding site in Greece, and, as it is situated along the migratory flyway for migratory birds en route to the Aegean Sea, the Balkan region, the Black Sea, the Hungarian steppes and beyond it experiences an interesting migration.
In the flat and semi-mountainous area, important hydrobiospheres are developing which are of great international significance and acceptance. The most essential hydrobiosphere is the one in Kerkini lake. It is a miracle of nature which came about by man's technical intervention on the natural characteristics of Strymon river. The water extent, which varies from time to time from 54 Km2 to 72 Km2, works out to be useful in two ways: as a technical work of great agricultural utility and as a hydrobiosphere for thousands of water fowls.