sentences:  This is the second largest population of the endangered subspecies of western chimpanzee, after Guinea,
  with the largest density in the Loma area, 2.69 individuals per km2, and the Outamba, with 1.21 individuals per km2.There are several species of whales and the African manatee in the waters of Sierra Leone.The manatee is an endangered species and lives in the rivers and estuaries of Sierra Leone especially around Bonthe.