Study
Finding a parent in a king penguin colony: the acoustic system of individual recognition
Jouventin, Pierre; Aubin, Thierry; Lengagne, Thierry
Animal Behaviour, 1999
Calls were recorded in a king penguin colony and played back to chicks after systematic modification — removing frequency bands, reversing the signal, adding colony noise — to identify which acoustic features carry identity and how they survive the noise of tens of thousands of birds.
- Studied in
- Aptenodytes patagonicus
- Sample size
- playback trials with chicks and adults in a breeding colony
Identity is carried redundantly in the frequency structure of the call, and recognition survives substantial degradation and masking by colony noise. Chicks respond selectively to a parent's call among thousands, and the coding is robust to the loss of individual components.
What it means
The authors' reading, and ours. Where they differ, that difference is the point.
How the authors put it
King penguins solve an extreme recognition problem with a redundantly coded acoustic signature rather than with a single distinguishing feature.
How NatureHQ reads it
King penguins have no nest — the egg and chick are carried on the feet — so a returning parent cannot use a location, which is how almost every other colonial seabird solves this. The signal has to do all the work, in a crowd, in wind. What the playback modifications show is that the identity information is spread across the call rather than concentrated, which is exactly the design you would build if you expected the signal to arrive damaged. It is a good example of an environmental constraint being legible in the structure of a signal.
- Playback measures response to a stimulus, not the full recognition process in ordinary conditions.
- One species with an unusually severe version of the problem; nesting penguins face an easier task.
- Chick responses are easier to score than adult ones, so the evidence is stronger in one direction.
Breaking a call apart to find where the name is kept
How does a king penguin chick pick its parent out of a colony of tens of thousands, with no nest to wait at?
What this study is used for on NatureHQ
One study can inform several subjects. Here is everywhere this one is cited.
Published by: Elsevier journalsPublished in an Elsevier journal.
doi.org/10.1006/anbe.1999.1086
This reference was resolved automatically against Crossref on 2026-08-11.
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