Endangered Species Crisis

Scientists believe we are experiencing Earth's sixth mass extinction — the first caused by a single species (humans). The IUCN Red List (2023) documents 42,100 threatened species of 150,000 assessed — but since only a fraction of species have been assessed, the true scale is far larger. An estimated 1 million species face extinction within decades. Extinction rate is 100-1,000x the natural background rate. The drivers (in order of impact for most species): habitat loss and degradation (agriculture, urban expansion, deforestation — the primary driver); direct exploitation (hunting, fishing, collection); invasive species; pollution; and climate change (which will become the dominant driver in the 21st century). Conservation success stories exist: the white rhino recovered from near-extinction (fewer than 100) to 20,000+; the California condor from 27 individuals to 500+; the bald eagle; the grey wolf (partially). But these successes require enormous sustained resources.