Hi, folks — The City Creatures blog is on hiatus this week. We’re celebrating every explosion of color and every vibrant spark of interdependence. We’ll be back to the normal schedule in two weeks. It seems a good time to recommend Jeremy Ohmes’s previous post on fireflies (aka lightning bugs), who are beginning to light up the prairies and grasses in the U.S. this summer, and Arthur Pearson’s post on lumen and illumination. Enjoy!