Study
A quantitative analysis of the dawn chorus: temporal selection for communicatory optimization
Henwood, Karen; Fabrick, Ann
The American Naturalist, 1979
Modelled how atmospheric conditions affect the transmission of bird song, comparing the still, thermally uniform air present around dawn with the turbulent, convective conditions that develop as the ground warms, and derived the expected difference in the distance over which a song remains detectable.
- Studied in
- Aves
- Sample size
- modelled sound transmission under dawn and daytime conditions
Sound transmits substantially further and with less distortion under early-morning atmospheric conditions than later in the day, giving a modelled advantage to singing at dawn that is largest for the frequencies typical of song.
What it means
The authors' reading, and ours. Where they differ, that difference is the point.
How the authors put it
The dawn chorus is timed to exploit a daily window in which acoustic transmission is unusually good.
How NatureHQ reads it
This is the acoustic explanation for the dawn chorus, and it is worth being clear about what kind of evidence it is. It is a physical argument with a model behind it, not a measurement of birds, and it predicts a benefit rather than demonstrating that any bird obtains one. It has been asserted far more often than it has been tested, which is a recurring feature of dawn chorus explanations — the phenomenon is easy to observe and the competing accounts are hard to separate.
- A transmission model rather than a field measurement of real songs in real habitats.
- A benefit that exists physically is not thereby the reason a behaviour occurs.
- Conditions vary greatly between habitats, and the modelled advantage is much smaller in some than others.
What this study is used for on NatureHQ
One study can inform several subjects. Here is everywhere this one is cited.
Published by: University press journalsPublished in a university press journal.
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 2026-09-02.