Rodent control boosts endangered seabird population in Mediterranean

Conservation efforts on Zannone Island have yielded remarkable results, with the Zannone shearwater population nearly trebling following the removal of invasive black rats from the Mediterranean habitat. The breeding pairs have increased from 27 to 80 in recent years, marking a significant milestone in species recovery.

Black rats, which predate on seabird eggs and chicks, have long posed a severe threat to ground-nesting species across island ecosystems. Their removal from Zannone Island created safer breeding conditions for the shearwaters, allowing more birds to successfully raise their young to fledgling stage.

The Zannone shearwater is endemic to the Mediterranean region and had faced steep population declines due to predation, habitat loss, and human disturbance. The species' recovery on the Italian island demonstrates the effectiveness of targeted pest control in marine bird conservation strategies.

Conservationists view the results as a template for protecting other endangered seabird populations across Mediterranean islands and similar ecosystems. The success underscores how addressing invasive predator populations can deliver measurable improvements in biodiversity, providing renewed momentum for broader regional conservation initiatives.