Gordon wanted to make a correction for this podcast: Carolina chickadees are quite common here at the Wilderness Center, its Carolina wrens that are not all that common. Fireflies and bioluminescence: In 1951 W.D. McElroy described the chemical reaction of bioluminescence in the following way-“Luciferin (a substrate) + Luciferase (an enzyme) + ATP + O2 = Bioluminescence. Corvids are bird species of the family Corvidae which includes: jays; magpies; crows and; ravens.