[1] The sea has a moderating effect on the climate, so temperatures do not fall much below 0 °C (32 °F) in winter, and are not as high in the summer as in area further inland.

[2] The Kaliakra cliffs in the north of Bulgaria are rich in flora, including many species in common with the neighboring Steppic and Mediterranean Regions.

The western Black Sea Region is the Via Pontica, Europe's second largest bird migration route.

[1] The migrating birds use the coastal lakes, marshes and lagoons behind the shoreline, and some spend the winter in these wetlands.

[2] In Bulgaria and Romania the region is threatened by development of agriculture, industry, urbanization and tourism.