Army ants such as these Eciton burchellii are important predators in many tropical ecosystems. Captive colony at the California Academy of Sciences
Army ants on the march. This species, Neivamyrmex californicus, is endemic to California and Baja California. Jasper Ridge, California, USA
Neivamyrmex melanocephalus army ants initiating a live-ant bridge with their own bodies. Here two ants lean against each other while a third starts to climb. Sycamore Canyon, Arizona, USA
