* Region: Different regions have different climates and habitats, leading to varying populations.
* Species definition: Do we mean individual animals or species as a whole?
* Population data: Accurate, up-to-date population data is often limited or incomplete.
However, we can list some animals that are widely distributed and have large populations in North America:
Mammals:
* White-tailed deer: Found throughout most of the continent, including the US and Canada.
* Eastern grey squirrel: Common in Eastern North America.
* Red fox: Widespread across the continent.
* American beaver: Abundant in forested areas.
* Cottontail rabbit: Found in a variety of habitats.
Birds:
* American robin: One of the most familiar birds in North America.
* Northern cardinal: A vibrant bird found in the eastern half of the continent.
* Canada goose: Widespread across the continent, especially in the north.
* Mourning dove: Found throughout most of North America.
* American crow: Common across the continent, with a wide variety of habitats.
Fish:
* Rainbow trout: Found in cold, clear water across the continent.
* Largemouth bass: Popular sport fish in many lakes and rivers.
* Bluegill: Common in ponds and lakes.
* Catfish: Diverse group of fish found in many waterways.
* Salmon: Found in rivers and streams flowing into the Pacific Ocean.
Other animals:
* American alligator: Found in the southeastern US.
* Snapping turtle: Common in ponds and rivers.
* Honeybee: An important pollinator found throughout the continent.
* Monarch butterfly: Iconic butterfly with a widespread range.
Remember that this is just a starting point. To learn more about specific animals and their populations, you can consult resources like:
* National Geographic: https://www.nationalgeographic.com/
* The Nature Conservancy: https://www.nature.org/
* Audubon Society: https://www.audubon.org/
* Wildlife Conservation Society: https://www.wcs.org/