There used to be a bigger lake in the Gaidarana Basin. Already from the 18th century had undergone partial draining, while further draining works were carried out in the early 20th century. Today it is divided into the main Gaidarana Lake, the ponds of Fountana and Agios Onoufrios. Here there are seasonal water surfaces, wet meadows, meadows, reeds, European White Water Lilies, areas with Christ's Thorns, Field Elms, Narrow-leaved Ashes, White Willows, White Poplars etc. There are Epeirus Water Frogs, Greek Marsh Frogs, Common Tree Frogs, Agile Frogs, Common European Toads, Greek Smooth Newts, Macedonian Crested Newts, European Pond and Balkan Terrapins, Hermann's Tortoises, Turkish Geckos, European Glass Lizards, Greek Slow Worms, Balkan Green Lizards, Ionian Wall Lizards, Dalmatian Algyroides, Balkan Whip Snakes, Leopard Snakes, Grass Snakes, Dice Snakes, Eastern Montpellier Snakes and Nose-horned Vipers. Various species of ducks and herons have been observed, as also Common Moorhens, the Eurasian Coots, the Little Grebes, etc. The presence of the Eurasian Otter has not been confirmed, but there are Red Foxes, Beech Martens, Northern White-breasted Hedgehogs, Balkan Moles etc. The Golden Jackal disappeared around 1980.