The article discusses how there is a lack of biodiversity data in tropical countries, making it difficult to accurately measure biodiversity loss. While the tropics have the most species, data is more available in polar regions. This poses a challenge for global biodiversity monitoring and for countries to track their impact on biodiversity. The researchers analyzed four global biodiversity datasets to see how well they cover tropical biodiversity. They found that efforts to address this data gap are not sufficient, and suggest activities to improve biodiversity monitoring in tropical nations.