endling

noun

1. (rare)The last individual of its species or subspecies, which therefore becomes extinct upon its death.

   “The last known survivor, the endling of its species, is now stuffed and mounted in a museum in the remote, dusty city of Nukus.”

   “Endlings are also recorded for the quagga, an equine with zebra-like stripes on its front half, which died in 1883 in a zoo in Amsterdam; a Caspian tiger killed in the 1950s in Uzbekistan; and whichever of a pair of great auks killed in 1844 off the coast of Iceland died second.”

   “It feels as if I'm the last one left—a human endling—the world turned silent beneath my boots.”