Emperor Penguin Breeding Declines on Coulman Island

A study published in *Communications Earth & Environment* reports a sharp decline in the number of chicks at the emperor penguin colony on Coulman Island, with chick counts falling by roughly 69 % in 2025 compared with the previous year. The research team attributes the drop to a large iceberg that became grounded off the island between July 2025 and January 2026, effectively limiting the birds’ access to nearby foraging zones that are critical for feeding chicks during the breeding season.

The authors note that the grounding event occurred despite generally favorable sea‑ice conditions across the region, suggesting that the movement and positioning of individual icebergs can have a direct impact on breeding success. The findings underscore the importance of monitoring iceberg dynamics alongside broader sea‑ice trends to better understand and predict the reproductive outcomes of Antarctic penguin populations.