"Critically endangered" is a conservation status assigned to species that face an extremely high risk of extinction in the wild. This classification is part of the International Union for Conservation of Nature (IUCN) Red List, which assesses the conservation status of various species globally. Factors contributing to this status include habitat loss, poaching, climate change, and invasive species. Species labeled as critically endangered often have very small populations, making them vulnerable to further decline. Conservation efforts are crucial to protect these species, which may include habitat restoration, legal protection, and breeding programs in captivity. Examples of critically endangered species include the Sumatran orangutan and the Vaquita.