How do penguins filter excess salt from the seawater they drink?
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Penguins possess a specialized supraorbital gland located just above their eyes that filters salt directly from their bloodstream. This concentrated salty fluid is then excreted through their nasal passages, often looking like they are sneezing or dripping from their bills. This neat trick allows them to survive for months at sea without needing fresh water. Photo: Matthias Scholz, Wikimedia Commons, CC BY 2.5.
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Source: Wikipedia (CC BY-SA)
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