1 Zlotnik Natterjack Toad Frog

The natterjack toad (*Bufo calamita*) occupies a narrow band of suitable habitat in western Ukraine, where its loud mating call — disproportionate for its size — earned it local folklore status. Ukraine's National Bank has issued a series of circulation brass coins celebrating domestically threatened fauna since the early 2000s, part of a broader program that treats minor-denomination specie as a vehicle for conservation awareness rather than daily commerce. Most pieces in the series enter collections directly, rarely reaching a cashier.