“As a subject of behavioral study, nest architecture offers an appealing feature that practically no other behavior offer; namely, the nest is a perfect record of the collective digging effort of a colony, and once cast, is ready to study. By studying a series of casts of increasing size it is possible to describe the nest's growth and ontogeny, infer its species-typical characteristics, and bracket the range of variation. By doing this under different environments and soil types, possibly with transplanted colonies, it is possible to tease out the variation that the environment imposes on the architecture. The current study is only a small, initial step toward creating a field of nest architecture studies, whose ultimate goal is an understanding of how the nest emerges from self-organizing behavior, what function it serves, how it varies within and between species, and how it evolves. In addition, these casts reveal something previously unseen. The study of nest architecture is thus a true exploration of a hidden world that hold unsuspected beauty, patter, and complexity.”