Obverse: the obverse of the coin depicts a small horseshoe bat. The lower part of the coin depicts the bat on the portrait.
Reverse: The coin features the coat of arms of Poland in the middle of the reverse, the year '2010' and the denomination 'ZŁ 20 ZŁ' at the bottom. The name of the State 'RZECZPOSPOLITA POLSKA' at the top
About the coin: The coin is part of the series "Animals of the World".