Synchronous fireflies illuminate the forests of Great Smoky Mountains National Park, Tennessee

green forest nature natural landscape woodland natural environment tree northern hardwood forest old-growth forest vegetation nature reserve biome tropical and subtropical coniferous forests blue temperate broadleaf and mixed forest leaf light yellow spruce-fir forest temperate coniferous forest grove plant sunlight grass jungle woody plant wood deciduous valdivian temperate rain forest wildflower trunk landscape plant community riparian forest autumn