This is on a whim, so here goes!!
Greece is conviniently divided into north and south; two countries really, one is Balkan, the other Mediterranean.
The list:
North (N)
1. Evros Delta and surroundings. 2. Dadia National Park and along the river and surroundings. 3. Vistonis and surroundings including the Kompsatos Gorge. 4. Central Rhodope Mountains. 5. Kerkini and Belles Mountain forests. 6. Thermaikos Gulf Wetlands. 7. Lake Volvi. 8. Prespa. 9. Northern Pindos. 10. Kalamas Delta and Kalamas valley. 11. Corfu. 12 Amvrakikos. 13. Olympus and surroundings, including Tempe and Pinos Delta area. 14. Lake Karla. 15. Lesvos.
South (S)
1. Southern Amvrakikos, incl. Northern Lefkada. 2. Arakinthos, Lakes, Klisoura Gorge. 3. Messolonghi. 4. Strophilia-Kotychi. 5. Pylos. 6. Spercheios Delta. 7. Oiti. 8. Parnassus. 9. Lakes Yliki-Paralimni. 10. Schinias -Marathon Lake and surroundings. 11. Skyros. 12. Samos. 13. Rethymnon area. 14. Chania area. 15. Antikythira.
The background map is from eBird, 12.03.2023