Small Heath Coenonympha pamphilus

The smallest butterfly in its entire subfamily is also one of the most tireless fliers, skimming grasslands with a characteristic fluttering motion. Despite tiny size and subdued brown coloring, it thrives in suitable habitat—though much less than it used to. Watch summer grasslands and you might spot a small brown form zipping just above the grass tops.

Unlike many butterflies that bask with open wings, this species rests with wings folded closed. Its preference for drier grasslands across Eurasia and North Africa made it extremely abundant—until habitat loss transformed its world. Now it's vanishing from regions where it once dominated, a reminder that even common butterflies face sudden decline.