Bugland: No Glow
Fireflies are best known for showy nighttime displays, but not all fireflies flash. The Xerces Society, an invertebrate conservation group, reports more than 2,200 firefly species have been found all over the world. In North America the flashy ones — also called lightning bugs — are primarily found primarily east of the Mississippi River. It’s possible, though rare, to find a glowing firefly in Colorado. However, you are much more likely to encounter a non-glowing Daytime Dark Firefly like the one pictured here, photographed in Park Hill by Mark Silverstein.