The island has two very important and protected bird reserves, Psalidi wetlands and Tigaki salt lake. The wetlands of Psalidi can be found 4km to the south-east of Kos town.
After the winter’s first rainfall, when the water level is high enough, flamingos, ruddy shelducks and long-legged buzzards can be spotted here. During migration in April and May, the island is full of Bee-eaters, Rollers and Cattle Egrets even in smaller fields into the city of Kos. The island provides a resting point for many waders and ducks during migration, being one of the few breeding places in Europe for ruddy shelducks.