Scientists have described the range of the total number of world's species between 1.7-1.8 million as in 2010. The total number of plants over the earth is approximately 3,21,212, the total number of vertebrates is approximately 62,305, the total number of invertebrates is approximately 1,305,250, and others (bacteria, cyanobacteria, algae) are approximately 51, 563. Thus, the number of species over earth totals to 1,740,330.