Extreme heat driven by climate change has wiped out 25-38 percent of tropical bird populations since 1950, a global study has found. According to an analysis released today on the University of Queensland, Australia, website, the study, conducted by Australian and European researchers, analysed over 3,000 bird populations and 90,000 observations from 1950 to 2020. Results showed extreme heat, more than habitat loss or rainfall changes, is the primary driver of bird declines in the tropics. Birds now face dangerously hot days up to ten times more often, leading to dehydration, nest abandonment, and reduced breeding success. Even untouched tropical forests are impacted. With nearly half of all bird species found in tropical regions, the findings pose a serious threat to global biodiversity.