If no members of a species are alive today what is true of that species?

If no members of a species are alive today, that species is considered extinct. This means that all individuals have died out and there are no remaining populations to reproduce or sustain the species. Extinction can result from various factors, including environmental changes, loss of habitat, predation, or competition with other species. Once a species is extinct, it cannot return unless through de-extinction efforts, which are currently experimental and controversial.