More than 99 percent of all species, amounting to over five billion species,[14] that ever lived on Earth are estimated to be extinct.[15][16][17] Estimates on the number of Earth's current species range from 10 million to 14 million,[18] of which about 1.2 million have been documented and over 86 percent have not yet been described.[19]
Hmabi leswi vutomi byi kumekaka himixaka yotala, kuringanyetiwa leswaka 99 wa tiphesenti ta swivumbiwa leswi hanyaka eka 5 biliyoni,[7] wa swivumbiwa leswi tshameke swi hanya laha misaveni, aswahari kona.[8][9] kuringanyetiwa leswaku kana kwalomu ka 10 kuya 14 wa timiliyoni taswivumbiwa leswi hanyaka.[10] Hambileswi vutomi byi vonakaka laha misaveni ntsena, vanhu votala va ehleketa leswaku kuna mihlovo ya swivumbiwa leswi hanyaka ehandle ka misa.[11][12]