It’s a photo of the life stages of bed bugs (sans only one stage) arrayed in single file formations and I think of it as the marching dead bed bugs—but actually some of them look quite prosperous, engorged as they are. The photographer is Allison Taisey.

It’s in Part 1 (PDF) of the Guidelines for Prevention and Management of Bed Bugs in Shelters and Group Living Facilities, New York State IPM Program, Cornell University.

And on page 7 there is a useful scale of actual sizes, little zeroes that give you an idea of what you’re dealing with. Pretty neat.