| Rank | Name | Population |
|---|---|---|
| 1 | Insects | 10 Quintillion |
| 2 | Fish | 3.5 Trillion |
| 3 | Birds | 50 Billion |
| 4 | Bat | 10 Billion |
| 5 | Human | 8 Billion |
| 6 | Cattle | 1.5 Billion |
| 7 | Pig | 1 Billion |
| 8 | Sheep | 1 Billion |
| 9 | Dogs | 900 Million |
| 10 | Goats | 850 Million |
| 11 | Domesticated Rabbits | 709 Million |
| 12 | Cats | 600 Million |