1 Zlotnik Greater Mouse Eared Bat

The zlotnik is a pre-metric Ukrainian unit of weight — roughly 4.266 grams — revived here as a denomination name rather than any functional currency value, part of a broader NBU series spotlighting endangered native fauna. The Greater Mouse-eared Bat (Myotis myotis) has seen significant population decline across Eastern Europe due to roost disturbance and agricultural pesticide use, and is listed under both the Bern Convention and the EU Habitats Directive, though Ukraine's obligations to those frameworks remain voluntary rather than treaty-bound.