Tropical rainforest species are at especially high risk, as are top carnivores, species with small geographic ranges, and marine reef species. Humanity's main impact on the extinction rate is ...

Scientists estimate that a third or more of all the roughly 6,300 known species of amphibians are at risk of extinction [6]. Frogs, toads, and salamanders are disappearing because of habitat loss, ...

View Full Profile. Learn about our Editorial Policies. A review of more than 12,000 invertebrates suggests that one fifth of them are at risk of extinction, with freshwater species facing the greatest ...