Some African termites build mounds that rise more than five meters above the ground, creating towering structures around their colonies. Coral reefs extend for many thousands of kilometers. Spider silk can be stronger than steel by weight. None of these creatures can draw blueprints, but they can still produce structures that are highly sophisticated from an engineering perspective. How animals achieve this has been a subject of scientific study for decades, with researchers examining how simple individual actions can give rise to complex structures.
New Insights into Animal Architecture and Environmental Modification
A recent review by Dartmouth College behavioral ecologist Mark Laidre, published in Current Biology, synthesizes research on how various animals, from termites to hermit crabs, influence and alter their physical environments. The study highlights the emergence of complex animal architecture through the actions of individual builders and examines how social insects utilize local cues and interactions to create coordinated structures without centralized control.
Focusing on the African termite Apicotermes lamani, researchers Alexander Heyde, Lijie Guo, Christian Jost, Guy Theraulaz, and L. Mahadevan explored the intricate underground nests of these termites. Their findings, published in the Proceedings of the National Academy of Sciences, utilized CT scans to reveal the nests’ internal architecture, which includes parallel floors linked by linear and helical ramps. The team developed a mathematical model to investigate how termite behavior, pheromones, and mud interact to form this organized structure through a physical feedback process. These insights could enhance understanding of swarm intelligence and self-organizing principles in architectural design.
Constructing such elaborate structures comes at a cost. Honeybees invest months of labor into building wax combs, while naked mole rats expend significantly more energy tunneling through compact soil than they would in open terrain. However, the benefits of these investments can be substantial. Well-constructed shelters can regulate temperature, store food, protect young, and attract mates, which sometimes leads certain animals to forgo construction entirely in favor of occupying existing structures.
For instance, hermit crabs inhabit shells created by snails and some species even remodel these shells to better suit their needs, effectively creating a market for reusable homes that are passed down through generations. Conversely, beavers transform entire river ecosystems by building dams that reshape the habitats of surrounding plants and animals for extended periods. Remarkably, some termite mounds can endure for centuries or even millennia, allowing successive colonies to recolonize and modify them over time.
All the complexity arises through thousands of small interactions between animals and their environment, not due to a single plan or idea. What all these examples have in common is that they seem not to be designed by any mastermind, but rather represent a process in which individual animals respond to one another and their surroundings until something remarkable emerges. So next time you see an ant colony that seems unremarkable, take a second look. It might be a tangible representation of complexity arising out of simple behaviors.
