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Geographic region: United States
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Geographical regions (1)

Ecological regions (3)

Geological regions (3)

Viruses (3)

Prokaryotes (7)

Protozoa (3)

Algae (4)

Plants (35)

Fungi (3)

Invertebrates (3)

Flatworms (1)

Annelids (1)

Molluscs (3)

Nematodes (1)

Arthropods (16)

Ticks (2)

Spiders (480)

Insects (10)

Flies (63)

Butterflies (1)

Fishes (4)

Amphibians (12)

Reptiles (6)

Dinosaurs (1)

Birds (15)

Mammals (13)

Links

https://www.cia.gov/library/publications/the-world-factbook/geos/us.html

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Last updated: 15 Jul 2019