Forests, grasslands and desert environments are all examples of terrestrial animal habitats. Aquatic and marine habitats include lakes, ponds and oceans. Animal habitats are also defined by physical factors including soil type and quality, moisture, temperature ranges as well as the availability of light and biotic factors such as potential food sources and the presence of predators.
A habitat or biome is an ecology or environment inhabited by a specific type of plant or animal species. Terrestrial habitats include coniferous, deciduous and rain forests as well as mountainous, coastal and desert environments. These habitats are typically defined based on their physical geography, the presence and type of plant species present as well as regional climate. Further examples include tundra, urban and polar environments.
Freshwater environments include wetlands, bogs and marshes that are typically home to a wide variety of both plant and animal species. Only a tiny fraction of the Earth's surface water is freshwater, but these ecosystems include all of the habitats found in or near rivers, lakes and streams. Marine habitats include coastal estuaries, deep water environments, sea beds, open oceans and hydrothermal vents. Oceans cover over 70 percent of the Earth's surface and marine habitats are home to numerous animal species, many of which have not been extensively studied.