Revised population estimate and trends for the Endangered Northern Rockhopper Penguin Eudyptes moseleyi at Tristan da Cunha

A critical population assessment of the Endangered Northern Rockhopper Penguin (Eudyptes moseleyi) at Tristan da Cunha reveals that over 65% of the global population resides in this remote South Atlantic archipelago, with breeding numbers estimated at 168,700 pairs across four islands. The study, the first to update counts since 1973 for Middle Island, found stable populations over three decades, contrasting with broader declines observed elsewhere. Researchers employed comprehensive aerial and ground surveys in 2009, providing a baseline for conservation efforts at this UNESCO-listed site, which is vital for the species' survival.

ROBSON, B., GLASS, T., GLASS, N., GLASS, J., GREEN, J., REPETTO, C., RODGERS, G., RONCONI, R. A., RYAN, P. G., SWAIN, G., & CUTHBERT, R. J. (2011). Revised population estimate and trends for the Endangered Northern Rockhopper Penguin Eudyptes moseleyi at Tristan da Cunha. Bird Conservation International, 21(4), 454–459. https://doi.org/10.1017/s0959270911000013