Avian navigation: Comparing the olfactory navigational “map” and the infrasound direction-finding hypotheses to aeronautics
Journal of Comparative Physiology A
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Abstract
Animal navigation has long been a fascinating but bewildering subject. Humans and animals might well share similar navigational strategies because they developed within the same physical environments. A “map-and-compass” model has been proposed to explain the two-step avian navigational process, but the “map” step has remained elusive. Although scalar values from bicoordinate geomagnetic or atmospheric olfactory gradients have been considered foundational to the avian map, neither has proved convincing engendering decades of controversy. The olfactory map, and an alternative infrasound direction-finding (IDF) hypothesis, are discussed in this review. The olfactory map hypothesis currently requires extensive stable gradients of trace-odor ratios, but such gradients are highly unlikely within a turbulent and rapidly mixed lower atmosphere. The IDF hypothesis, on the other hand, postulates a two-step navigational model analogous to the maritime and aeronautical radio direction-finding technique. This review was also written to encourage further investigation, and direct testing, of the acoustic navigational process. The IDF hypothesis, at present, appears the better explanation of observed avian navigational behavior and accuracy within the atmosphere’s physical environment.
Suggested Citation
Hagstrum, J.T., 2025, Avian navigation: Comparing the olfactory navigational “map” and the infrasound direction-finding hypotheses to aeronautics: Journal of Comparative Physiology A, v. 211, p. 603-616, https://doi.org/10.1007/s00359-025-01748-3.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Avian navigation: Comparing the olfactory navigational “map” and the infrasound direction-finding hypotheses to aeronautics |
| Series title | Journal of Comparative Physiology A |
| DOI | 10.1007/s00359-025-01748-3 |
| Volume | 211 |
| Publication Date | June 27, 2025 |
| Year Published | 2025 |
| Language | English |
| Publisher | Springer Nature |
| Contributing office(s) | Geology, Minerals, Energy, and Geophysics Science Center |
| Description | 14 p. |
| First page | 603 |
| Last page | 616 |