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the claim

Birds are poor smellers or do not rely heavily on olfaction.

the verdict
REFUTED
the evidence says no
Recorded sources
0 sources for · 3 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that birds are poor smellers or do not rely heavily on olfaction?

No. Recent comparative and neurobiological evidence refutes the long-standing assumption that birds have a poor sense of smell, demonstrating instead that olfaction plays a significant role in avian ecology and behavior.

Verdict: REFUTED · 0 sources for, 3 against · Last checked

Evidence against · 3
The endocast of the insular and extinct Sylviornis neocaledoniae (Aves, Galliformes), reveals insights into its sensory specializations and its twilight ecology.
2022
This study on the extinct bird Sylviornis neocaledoniae notes evidence that the species possessed a good sense of smell to aid in its ecology.
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S, R., JC, B., J, R., C, S., P, G., JS, S., & A, L. (2022). The endocast of the insular and extinct Sylviornis neocaledoniae (Aves, Galliformes), reveals insights into its sensory specializations and its twilight ecology.. doi.org. https://doi.org/10.1038/s41598-022-14829-z

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More against · 2
Hearing and Olfaction
2017
This review highlights increasing evidence that olfaction is actually a key sense in birds, guiding foraging, navigation, and social behaviors.
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Martin, G. R. (2017). Hearing and Olfaction. doi.org. https://doi.org/10.1093/oso/9780199694532.003.0003

Molecular characterization of chicken DA systems reveals that the avian personality gene, <i>DRD4</i>, is expressed in the mitral cells of the olfactory bulb.
2025
Molecular research on chicken brains demonstrates that the avian personality gene DRD4 is expressed in the olfactory bulb, underscoring functional olfactory processing in birds.
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T, F., N, A., C, M., KJ, H., & S, Y. (2025). Molecular characterization of chicken DA systems reveals that the avian personality gene, <i>DRD4</i>, is expressed in the mitral cells of the olfactory bulb.. doi.org. https://doi.org/10.3389/fnana.2025.1531200

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