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Estimates of modern world species vary from 3 million to 100 million. The lower estimates are more-likely- between 5 and 30 million. The United Nations have estimated that about 150 species become extinct worldwide daily. There are about 2 million named species. The Macoun Marsh numbers below represent terrestrial and aquatic species.
GROUPS MACOUN MARSH KNOWN CANADA KNOWN
Viruses Not Counted 200
Bacteria 16 2,000
Plants (Non Vascular & Vascular) 267 5,000
Fungi 109 11,800
Protozoa/ Algae 81 7,000
Freshwater Molluscs 4 1,500
Hexapods/ Insects 497 30,000
Other Invertebrates 129 8,000
Freshwater Fish 0 200
Amphibians 5 42
Reptiles 2 42
Birds 96 426
Mammals 23 194
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Totals 1229 66,404
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