In the last 115 years according to the study, we have also have eliminated over 30% of the sample vertebrates studied both in population and in the range of places that they consider "home". That is like saying you are getting rid of about 6 of the 16 cities of Metro Manila and its inhabitants with a shrug of your shoulders. Based on the robust sample of 177 mammalian species they studied, the study found that 30 per cent have lost their geographic range (the extent of the places they are found) and that 40% have had severe population decline ("severe" means that their population has declined more than 80%). The mammals of south and southeast Asia, where all of the large-bodied species of mammals like Orangutans live, have lost more than 80% of their geographic ranges. Severe population extinctions of mammals have also been found in the Cape and Sahara regions in Africa, central Australia, the eastern United States, and the Atlantic forest in South America.