Study
Urban mockingbirds quickly learn to identify individual humans
Levey, Douglas J.; Londoño, Gustavo A.; Ungvari-Martin, Judit; Hiersoux, Margaret R.; Robinson, Scott K.
Proceedings of the National Academy of Sciences, 2009
On successive days, a volunteer approached a mockingbird nest and briefly touched its edge. A different volunteer performed the same approach on the final day. Volunteers varied in clothing and route, and the birds’ alarm and flush responses were measured.
- Studied in
- Mimus polyglottos
- Sample size
- 24 mockingbird nests on a university campus
Birds flushed sooner and gave more alarm calls with each repeated visit by the same person, but responded to a new person as they had on the first day — after as few as two prior encounters.
What it means
The authors' reading, and ours. Where they differ, that difference is the point.
How the authors put it
Mockingbirds distinguish individual humans quickly, which may help explain the success of this species in urban environments.
How NatureHQ reads it
A valuable companion to the crow face-recognition work because the species is unremarkable. Mockingbirds are not famous for intelligence, which makes the result a better guide to how common individual-human recognition might be. The design deliberately varied clothing, so the birds were not simply learning a shirt.
- Cannot isolate which cues — face, gait, size, movement — the birds used.
- Measures a defensive response near a nest, which may not generalise to other contexts.
- Conducted on one campus population habituated to heavy foot traffic.
What this study is used for on NatureHQ
One study can inform several subjects. Here is everywhere this one is cited.
Published by: Proceedings of the National Academy of SciencesPublished in PNAS.
doi.org/10.1073/pnas.0811422106
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.