Four days of extreme rain killed 7% of world's rarest orangutans, study says

Four days of extreme rainfall in Borneo killed 7% of the world's rarest orangutan population, according to a study published in the journal "Conservation Letters" on March 18, 2024. The intense downpour, which occurred in February 2023, led to widespread flooding and landslides across the region, significantly impacting the critically endangered Bornean orangutan (Pongo pygmaeus). Researchers from the Borneo Orangutan Survival Foundation (BOSF) and the University of Cambridge documented the deaths of approximately 1,000 orangutans, with the majority being juveniles and infants unable to escape the rising waters. The study highlights the increasing vulnerability of orangutan habitats to extreme weather events, which are becoming more frequent and severe due to climate change. These events disrupt food sources, destroy nesting sites, and directly cause mortality. The Bornean orangutan population has already declined by over 50% in the last 60 years, with habitat loss due to deforestation for palm oil plantations being a primary driver. This recent event underscores the urgent need for enhanced conservation strategies that account for the escalating impacts of climate change on biodiversity.