Here you see seagulls (two herring, one ring-billed) about to quench their thirsts in a small pond of melted ice water atop sea ice.
Sea ice takes longer to freeze due to its salt content, but freezing and melting can desalinate the ice; the older the melting ice, the less salt its melt-water will have. Very old sea ice will melt into a fluid that has no or virtually no salt. Unless you’re desperate, however, don’t drink that liquid – it may contain bacteria, viruses, and/or other contamination.
Seagulls and many other sea birds can—and often do – drink their sea water straight. But they seem to like fresh water when they can get it. Most seagulls and other sea birds have special desalinating glands that filter out excess salt, which is excreted through their nostrils, according to the literature. (Images taken in Blue Hill, Maine, on December 16, 2025.)
