- Size: Capybaras are the largest rodents in the world, with adults typically reaching lengths of 1.3-1.5 meters (4-5 feet) and weighing up to 65 kilograms (143 pounds). Nutria are smaller, with adults typically reaching lengths of 0.6-0.9 meters (2-3 feet) and weighing up to 12 kilograms (26 pounds).
- Habitat: Capybaras are native to South America and are found in a variety of habitats, including wetlands, grasslands, and savannas. Nutria are native to South America but have been introduced to many other parts of the world, where they can be found in a variety of habitats, including wetlands, rivers, and lakes.
- Diet: Capybaras are herbivores and feed primarily on grasses and other vegetation. Nutria are also herbivores but have a more varied diet that includes grasses, sedges, and other aquatic plants as well as some invertebrates and small animals.
- Behavior: Capybaras are social animals that live in groups called herds. Herds can range in size from a few individuals to over 100 individuals. Nutria are also social animals but tend to live in smaller groups called colonies. Colonies typically range in size from 5 to 10 individuals.
- Conservation status: Capybaras are listed as Least Concern by the International Union for Conservation of Nature (IUCN), while nutria are listed as Least Concern or of Least Concern in most of their introduced ranges. However, nutria are considered invasive species in some areas, where they can cause significant damage to ecosystems.