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Some, for example, have evolved to look like army ants, allowing the beetles to march alongside them and feed on their eggs and young.

Now that researchers have seen the light, they know what to look for in visually impaired arthropods such as army ants and blind beetles.

Voracious army ants prey on many insect and vertebrate species and can travel about 1 kilometer a day, often in and out of dense forests that researchers cannot easily enter.

Back in 1990, on David Attenborough’s The Trials of Life for instance, a medical endoscope was used to film inside a bivouac of army ants in Panama.

These army ants in Costa Rica don't build a nest in the earth or in an old tree.