acoustic bug buzzer cicada Cicada song closeup critter dog-day cicadas empty exoskeleton food hibernate insect instar larvae macro metamophose metamorphosis molt molting Noisy nymph pest protein source shed shell skin acoustic-shell acoustical-shell aerodynamic-canopy canopy concert construct constructing construction contained entertain entertaining entertainment fenced free grasas grassed-area music music-bowl open-air open-air-concerts outdoor outdoor-music-shell outdoor-orchestra-shell outdoor-orchestral-shell outdoor-performance-venue outdoor-theatre-shell outdoors park platform preparation public scaffolding shelter sheltering stage staging temporary theatre