First named by Carl Linnaeus in 1758, the yellow shell moth (Camptogramma bilineata) is a colorful, medium-sized geometer moth (Geometridae) measuring 20 to 25 millimeters across. Dressed in shades of bright yellow, ochre, and warm brown with wavy lines, this handsome insect thrives in gardens, meadows, and grassy woodland edges across Europe and Asia. Unlike many moths that only come out in the dark, the yellow shell is active both day and night throughout the summer. Their caterpillars feed on common low-growing plants like dandelions, chickweed, and sorrel, hiding in the soil over winter before emerging as adults the following season. I patiently followed this moth from leaf to leaf in a flowery meadow near my home in Barkarby, Sweden. It finally rested still for a couple of minutes—just long enough for me to adjust my camera settings and snap some clear shots!