A film crew for a National Geographic documentary sets up a robotic camera on a nest of red harvester ants, Pogonomyrmex barbatus. Sycamore Canyon, Arizona, USA

Pogonomyrmex californicus, the California harvester ant, standing guard at the nest entrance. Mojave National Preserve, California, USA

Western harvester ants (Pogonomyrmex occidentalis) make distinctive mound nests on the desert floor. Hallelujah Junction, California, USA