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the claim

The California condor population declined due to lead poisoning.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
5 sources for · 0 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 the California condor population declined due to lead poisoning?

Yes. A peer-reviewed study states directly that lead poisoning was a contributing factor in the decline of the California condor population in the 1980s. Other sources describe lead exposure as a pervasive threat and model lead-driven mortality causing rapid decline, while one paper lists lead alongside poaching and habitat loss.

Verdict: SUPPORTED · 5 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 5
Lead poisoning and the deceptive recovery of the critically endangered California condor
2012
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E., F. M., F., D. D., & Daniel, G. (2012). Lead poisoning and the deceptive recovery of the critically endangered California condor. zenodo.org. https://doi.org/10.5281/zenodo.19670269

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More for · 4
Genome-wide diversity in the California condor tracks its prehistoric abundance and decline.
2021
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Robinson, J. A., Bowie, R. C. K., Dudchenko, O., Aiden, E. L., Hendrickson, S. L., Steiner, C., Ryder, O., Mindell, D., & Wall, J. (2021). Genome-wide diversity in the California condor tracks its prehistoric abundance and decline.. doi.org. https://doi.org/10.1016/j.cub.2021.04.035

Spatiotemporal patterns and risk factors for lead exposure in endangered California condors during 15 years of reintroduction.
2014
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TR, K., J, G., D, G., A, W., J, B., LJ, B., KJ, S., M, J., R, P., D, M., J, R., JW, R., C, B., & CK, J. (2014). Spatiotemporal patterns and risk factors for lead exposure in endangered California condors during 15 years of reintroduction.. doi.org. https://doi.org/10.1111/cobi.12342

Effectiveness of Action to Reduce Exposure of Free-Ranging California Condors in Arizona and Utah to Lead from Spent Ammunition
2008
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Effectiveness of Action to Reduce Exposure of Free-Ranging California Condors in Arizona and Utah to Lead from Spent Ammunition. (2008). doi.org. https://doi.org/10.1371/journal.pone.0004022

Impact of the California Lead Ammunition Ban on Reducing Lead Exposure in Golden Eagles and Turkey Vultures
2011
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Kelly, T. R., Bloom, P. H., Torres, S. G., Hernandez, Y. Z., Poppenga, R. H., & Boyce, W. M. (2011). Impact of the California Lead Ammunition Ban on Reducing Lead Exposure in Golden Eagles and Turkey Vultures. doi.org. https://doi.org/10.1371/journal.pone.0017656

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