The number of threatened species is increasing.
But while animals like critically endangered orangutans or humpback dolphins are getting a lot of attention, the number of threatened mammals has not been rising as fast as in other animal classes. The number of threatened mammals (defined by the International Union for Conservation of Nature and Natural Resources
as species listed as either critically endangered, endangered or vulnerable on the Red List) increased by 12 percent between 2006 and 2018, the number of endangered insects rose by 147 percent in the same time period. The number of endangered molluscs (a class including snails, slugs, mussels, squid and worms) rose by 125 percent and the number of endangered reptile species by 283 percent.
While the reasons for the endangerment of insects are well known, less is written about threats to reptiles and molluscs. According to the IUCN, many reptile species are concentrated in rainforest regions and are therefore threatened by deforestation. Furthermore, the species are particularly sensitive to environmental changes, including climate change. With molluscs, endangered species are mainly those who live on land and in freshwater. They are threatened by habitat destruction or are being pushed out by invasive species, according to the American Institute of Biological Sciences.
The IUCN publishes a new version of its Red List every July. In the latest version, more than 13,000 animals were listed as threatened.