Broughton Island's Triumph: 15 Years On, Wildlife Returns

Broughton Island, off the coast of New South Wales, Australia, has seen a significant conservation success with the eradication of introduced rats and rabbits. These pests, arriving in 1906 and the 1930s respectively, severely impacted seabird nesting habitats and native vegetation. Conservation efforts, beginning in April 2009 with rabbit disease control and followed by aerial baiting in August 2009, aimed to restore the island's ecological balance.

Subsequent surveys indicated positive outcomes, including the return of species like Gould's petrels and storm petrels. Wedge-tailed shearwater colonies showed an increase in burrows and breeding pairs by 2018 compared to initial surveys in 2009. However, a 2018 study noted that population increases were also observed on other islands without pest eradication, suggesting that external factors such as prey availability are critical influences.

While the removal of pests has undoubtedly benefited ground-nesting birds and fostered the return of certain species, the overall surge in shearwater numbers is attributed to a combination of factors. Ongoing monitoring is essential to fully understand the long-term response of Broughton Island's diverse seabird populations to these ecological changes.