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Study

The ant odometer: stepping on stilts and stumps

Wittlinger, Matthias; Wehner, Rüdiger; Wolf, Harald

Science, 2006

Peer-reviewedfield experimentwild

What they did

Desert ants were trained to walk a known distance from nest to feeder. At the feeder, their legs were either lengthened with pig-bristle stilts glued on, or shortened by trimming, and they were then released to walk home.

Studied in
Cataglyphis fortis
Sample size
individually manipulated foragers, tens per condition

What they found

Ants on stilts overshot the nest; ants with shortened legs stopped short. Ants that made the outward journey on modified legs judged the return correctly, showing the error came from stride length rather than from the legs themselves.

What it means

The authors' reading, and ours. Where they differ, that difference is the point.

How the authors put it

Desert ants estimate distance by counting or integrating steps — a stride integrator, or pedometer.

How NatureHQ reads it

A famously direct experiment: the prediction is unambiguous, the manipulation is simple, and the result matches. The second condition is what makes it airtight — an ant that walks out *and* back on stilts gets home fine, so the mechanism is measuring strides rather than reading leg length. This is one species of desert ant, navigating in featureless terrain where visual landmarks are scarce.

Limitations

  • Attaching stilts is invasive and affects gait.
  • One species adapted to open desert; landmark-rich species navigate differently.
  • Stride integration is one component of navigation alongside path integration and sky-compass cues.

The experiment, explained

  • Ants on stilts

    How does a desert ant know how far it has walked, in a landscape with almost no landmarks?

What this study is used for on NatureHQ

One study can inform several subjects. Here is everywhere this one is cited.

Finding the paper

Published by: American Association for the Advancement of SciencePublished in Science or Science Advances (AAAS).

doi.org/10.1126/science.1126912

This reference was resolved automatically against Crossref and OpenAlex on 2026-08-11.

NatureHQ summarises research in its own words and does not reproduce published text. Reviewed 2026-08-09.