SYNCHRONOUS FIREFLIES IN THE SMOKIES Poster by Jim Embry. Great Smoky Mountains National Park is one of the few places in North America where fireflies (lightning bugs) flash in unison. In this spectacular watercolor painting by award winning artist Jim Embry, dozens of fireflies create bursts of light in the dense forest of the Smokies. Lithographed on top quality heavy weight paper. Suitable for framing. 20" x 7" All purchases benefit the park.