European Physa

OLYMPUS DIGITAL CAMERAThe European Physa is a small air-breathing freshwater snail. They are native to North America, contrary to their common name. If their population grows large enough they become a problem by decreasing oxygen in the water and using up food resources. They have been recorded at Dorchester, Stone, Eythrope Lake, Wheatley, and Shabbington in the River Thame catchment.