whirligig beetles (water beetles). comprising the family gyrinidae that usually swim on the surface

aggregation animal antique anxiety anxious aquatic beetle biodiversity biology bug coleoptera congregation crawling crimea diverse ecological ecology engraving entomology evolution floating foot gathering gyrate gyrinidae gyrinus insect invertebrate large metamorphosis monster nature nervous pinwheel toy pond river scary science sketch state stream surface swarming swimming variation wet whirligig wild wildlife