The study examines global trends and biases in biodiversity conservation research over the past four decades. By analyzing 17,502 research articles from four leading conservation biology journals, the authors found that conservation research remains biased towards popular species and ecosystems, with little attention paid to within-species genetic diversity. The most-studied species are often low-risk or domesticated animals, and terrestrial ecosystems are consistently over-represented, while plants, fungi, and freshwater ecosystems are under-represented. Despite an increase in the number of conservation articles published, the focus has increasingly centered on the same suite of taxa. The study highlights the need for targeted funding to investigate understudied systems to ensure more equitable and effective conservation efforts across different levels of biodiversity.The study examines global trends and biases in biodiversity conservation research over the past four decades. By analyzing 17,502 research articles from four leading conservation biology journals, the authors found that conservation research remains biased towards popular species and ecosystems, with little attention paid to within-species genetic diversity. The most-studied species are often low-risk or domesticated animals, and terrestrial ecosystems are consistently over-represented, while plants, fungi, and freshwater ecosystems are under-represented. Despite an increase in the number of conservation articles published, the focus has increasingly centered on the same suite of taxa. The study highlights the need for targeted funding to investigate understudied systems to ensure more equitable and effective conservation efforts across different levels of biodiversity.