Study
The ant odometer: stepping on stilts and stumps
Wittlinger, Matthias; Wehner, Rüdiger; Wolf, Harald
Science, 2006
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
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.
- 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.
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.
Animal navigation
Navigating animals use several overlapping compasses, not a single magic sense
Ants
Desert ants measure how far they have walked by counting their steps
Path integration
A desert ant walking a winding search does not retrace it. It keeps a running total of where home is and, the moment it finds food, runs straight there — even if you move it first.
Path integration
Give a desert ant longer legs and it overshoots home; shorten them and it stops short. Distance is measured from strides — which is not the same as an ant deliberately counting anything.
Published by: American Association for the Advancement of SciencePublished in Science or Science Advances (AAAS).
doi.org/10.1126/science.1126912
Checked against Crossref and OpenAlex on 2026-09-28, and they agree on the title, the authors and the year.
NatureHQ summarises research in its own words and does not reproduce published text. Reviewed 2026-08-09.