Of the estimated total of 8.743 million living species on Earth, roughly 89% of these are animals — or fauna. This estimated number widely varies, but scientists largely agree that this is likely the most accurate number. All scientists agree, however, that there are inestimable numbers of species still to be discovered. Of the 2,129,393 total species that are known to exist, a little over 1.5 million, or about 74%, are fauna. The population of fauna in each country varies greatly, but they are part of Earth’s total number of wildlife species. Click on any of the following links about the fauna populations in that country.