The lines are moving insects. The night I snapped this pic it was pitch black and hundreds of insects were swarming around my headlamp. So I took their picture! Inevitably I swallowed a tiny one. Another flew in my ear. The insectivore that night was me. Pacaya-Samiria Reserve, Loreto, Peru.
In our biodiversity garden in Ontario.
Green-headed coneflower with two tiny black shining flea beetles! (Asteraceae: "Rudbeckia laciniata").