Iceberg-driven constraints on colony–foraging connectivity result in severe decline in chick counts for the Coulman Island emperor penguin colony

Communications Earth & Environment, Published online: 23 July 2026; doi:10.1038/s43247-026-03764-w

A calved iceberg that obstructed the primary feeding corridor of an emperor penguin colony on Coulman Island during the 2025 breeding season resulted in a 69% decline in chick counts, according to integrated multi-satellite analyses and field surveys.