Silence Around Seal Colonies Required at Night on Heard Island and McDonald Islands

Heard Island and McDonald Islands, remote territories in the southern Indian Ocean, are known for their pristine natural environments and abundant wildlife, especially seal colonies. According to local lore and some anecdotal sources, there has been an unusual practice—sometimes described as a law—that requires all visitors or researchers to maintain absolute silence during nighttime hours when near seal habitats. The reasoning behind this rule is to avoid disturbing the seals' rest, as these animals are highly sensitive to noise pollution, particularly at night when they are most vulnerable. While there is no publicly available official legislation explicitly codifying this rule, its presence is often recounted in environmental protection discussions and by expedition teams. This quiet-hours custom emphasizes Heard Island's commitment to preserving its unique ecosystems. As a remote and protected nature reserve, minimizing human impact is a central principle, and this alleged noise restriction reflects the broader ethos of sanctuary and respect for wildlife. Due to the island's status and limited human activity, enforcement details remain unclear, and the information mostly stems from local conservation narratives.