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the claim

Penguins do not urinate and instead excrete nitrogen waste as uric acid in their feces.

the verdict
INSUFFICIENT LEANING
Recorded sources
2 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 penguins do not urinate and instead excrete nitrogen waste as uric acid in their feces?

Unclear. One peer-reviewed study of Pygoscelid penguins reports that they excrete uric acid as the main end product of nitrogen metabolism, and a comparative physiology source states birds generally excrete uric acid as their main nitrogen product. Neither source addresses the claim's assertion that penguins do not urinate at all.

Verdict: PARTIAL LEAN · 2 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 · 2
URINARY EXCRETION OF UREA, URIC ACID AND AMMONIA IN PYGOSCELLIDAE PENGUINS
1999
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RODRIGUES, E., CARVALHO, C. S., SALVO, L. M., & BACILA, M. (1999). URINARY EXCRETION OF UREA, URIC ACID AND AMMONIA IN PYGOSCELLIDAE PENGUINS. doi.org. https://doi.org/10.5380/avs.v4i1.3789

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More for · 1
The role of energy, serine, glycine, and 1-carbon units in the cost of nitrogen excretion in mammals and birds
2021
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The role of energy, serine, glycine, and 1-carbon units in the cost of nitrogen excretion in mammals and birds. (2021). doi.org. https://doi.org/10.15454/65WKZ0

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