Animals that live in rivers include fish, some insect larvae and reptiles, such as turtles. Mammals, such as river otters, beavers and muskrats, also live in rivers, as do amphibians, such as frogs and salamanders. More »

The River Ganges contains numerous animals, including amphibians, reptiles, birds, fish and the Ganges River dolphin. Hundreds of species reside in the waters of the Ganges River, live in the river basin and reside in su... More »

The many types of animals calling the Amazon River home are the Amazon River dolphin, giant sea otter, piranha, Amazon manatee, giant Amazon River turtle and electric eel, among many more. The Amazon River serves as a ho... More »

Animals that lay eggs are known as oviparous animals and include fish, birds, reptiles and insects. These types of animals have little to no other development within the mother. Mammals that lay eggs instead of giving bi... More »

Animals that eat both plants and other animals, called omnivores, occur in every major animal lineage, including insects, fish, reptiles, mammals and birds. By contrast, some lineages, such as spiders, are completely dev... More »

The kinds of animals that live in wetlands include a wide variety of birds, fish, frogs, reptiles and mammals. The specific species of animals that are found in wetlands are determined by the wetland's location. For exam... More »

There are many species of animals on Earth that spend the majority of their lives alone, including species of reptiles, amphibians, mammals, fish, insects and arachnids. Solitude is common in the animal world, and it may... More »