| The population of birds |
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This is a list of Gaviiformes species by global population. While numbers are estimates, they have been made by the experts in their fields. For more information on how these estimates were ascertained, see Wikipedia's articles on population biology and population ecology.
All Gaviiformes have been quantified.
Species by global population
| Common name | Binomial name | Population | Status | Trend | Image |
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| Yellow-billed loon | Gavia adamsii | 16,000–32,000 | Near threatened |
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| Red-throated loon | Gavia stellata | 200,000–600,000 | Least concern |
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| Black-throated Loon (Arctic Loon) | Gavia arctica | 275,000–1,500,000 | Least concern |
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| Pacific loon | Gavia pacifica | 930,000–1,600,000 | Least concern |
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| Common Loon | Gavia immer | 612,000-640,000 | Least concern |
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