How many known species are there?
It is not known
There is not an exact number of known species. The main idea is that this number is continually in flux as new species are found, taxonomic categories adjusted and redundancies recognized. It is extremely interesting to know that seventy percent of the world’s species occur in only 12 countries: Australia, Brazil, China, Columbia, Ecuador, India, Indonesia, Madagascar, Mexico, Peru, and Zaire. Believe it or not, the total number of species on Earth ranges from 5 to 30 million. Major scientific institutions around the world are working together to create an online database.