Introduction
Wildlife is distributed across every major region of the planet, from tropical forests and savannas to deserts, mountains, polar environments and the open ocean. Species are not spread evenly. Their distribution reflects long-term evolution, climate, geography, food availability, habitat structure and the ability to move between places.
Looking at wildlife around the world is not simply a matter of listing famous animals by continent. It is a way to understand how different environments support different communities of life and how environmental change can affect them.
Tropical forests
Tropical forests are warm environments that can receive substantial rainfall, although seasonal patterns vary. Their layered vegetation creates many habitats, from the forest floor to the canopy. Mammals, birds, reptiles, amphibians, insects and plants use different parts of this structure. Some species specialise in particular foods or forest conditions, while others move across a wider range.
Deforestation, fragmentation, hunting, mining, fires and infrastructure can affect tropical forest wildlife. Protecting large connected areas and respecting the rights and knowledge of communities who live in and manage these landscapes are important parts of conservation.
Savannas and grasslands
Savannas and grasslands occur in many regions, including parts of Africa, South America, Asia, Australia and North America. They support grazing mammals, burrowing species, insects, birds and predators. Seasonal rainfall, fire and grazing influence vegetation and the availability of food and cover.
Large animals may move over wide areas in response to water and vegetation. Fences, roads, land conversion and changes to fire or grazing can affect these movements. Smaller species also depend on the structure of grassland, including the height and diversity of plants and the presence of bare ground or shelter.
Temperate forests and woodlands
Temperate forests experience seasonal changes in temperature and plant growth. Depending on the region, they may be dominated by broadleaf trees, conifers or a mixture. Wildlife uses tree cavities, branches, understory vegetation, streams and dead wood. Some species hibernate, migrate or change their activity as seasons change.
Agriculture, urban growth, logging and road networks can reduce or divide forest habitat. Conservation measures often focus on retaining older trees, restoring native vegetation, protecting streams and keeping habitat connections open.
Boreal forests and northern landscapes
Boreal forests stretch across high northern latitudes in North America, Europe and Asia. They include coniferous forests, wetlands, lakes and open areas. Cold winters and seasonal variation influence food availability and animal movement. Some mammals and birds are adapted to snow and cold, while others migrate or change their diet through the year.
Wildfire is a natural process in many boreal systems, but changes in fire frequency, intensity and climate can alter habitat. Forestry, roads, extraction activities and changes to wetlands can also affect wildlife. The effects differ by species and by the way the landscape is managed.
Deserts and drylands
Deserts and drylands occur on several continents and include hot deserts, cold deserts and semi-arid landscapes. Water is limited or unpredictable, so animals may be active at night, shelter in burrows, use seasonal pools or move long distances between resources. Reptiles, mammals, birds and invertebrates can all be important parts of dryland food webs.
Deserts are not biologically empty. Many species are highly specialised, and some depend on short periods of rainfall or plant growth. Groundwater extraction, land degradation, off-road traffic and poorly planned development can damage habitat that recovers slowly.
Mountains and high-elevation habitats
Mountain regions create steep environmental gradients. Temperature, vegetation and moisture can change quickly with elevation and slope direction. Different species occupy different zones, and some move up or down mountains as seasons change.
Mountains can also act as barriers between populations. Roads, tourism facilities, mining and climate change may alter habitat or restrict movement. Protecting connected valleys, slopes and elevational routes can help species respond to changing conditions.
Polar regions and tundra
Arctic and Antarctic environments are very different, but both include cold conditions, strong seasonality and important links between land, ice and ocean. Arctic tundra supports migratory birds, herbivores, predators and specialised plants. Antarctic wildlife is strongly associated with the surrounding ocean and seasonal sea ice.
Changes in snow, ice, sea temperature and the timing of seasonal events can affect access to food and breeding sites. Because many polar species depend on a limited set of habitats, changes in those conditions can have wide effects.
Rivers, lakes and wetlands
Freshwater habitats are found across continents and include rivers, lakes, streams, marshes, floodplains and peatlands. They support fish, amphibians, aquatic insects, birds and mammals, as well as terrestrial species that depend on water. Rivers connect habitats across entire catchments, carrying nutrients and supporting movement for some species.
Dams, water abstraction, pollution, drainage and invasive species can alter freshwater ecosystems. Wetland and river conservation therefore benefits from catchment-scale planning and the protection of natural water flows.
Coasts and oceans
Coastal habitats include mangroves, estuaries, seagrass beds, rocky shores, beaches and coral reefs. These environments provide feeding, nursery and resting areas for many species. Open-ocean wildlife includes animals that migrate across vast distances, while deep-sea communities live under very different light, pressure and temperature conditions.
Fishing pressure, bycatch, plastic and chemical pollution, coastal development, underwater noise and climate change can affect marine wildlife. International cooperation is often needed because marine animals and trade routes cross national boundaries.
Wildlife in human-shaped landscapes
Animals also live in agricultural areas, villages, cities and industrial landscapes. Some species adapt to parks, gardens, buildings and transport corridors, while others avoid disturbance or are pushed into smaller habitat patches. Urban wildlife can include birds, bats, foxes, insects, reptiles and many other organisms, depending on the region.
The presence of an animal in a city does not mean that the environment is safe for it. Traffic, glass, artificial lighting, pets, waste and habitat fragmentation can create risks. Thoughtful planning can provide green connections and reduce avoidable conflict.
Why species distributions differ
Climate is important, but it is not the only factor. Evolutionary history, barriers such as oceans and mountain ranges, competition, predators, disease and the availability of food all help shape where species occur. Some animals have broad ranges; others are restricted to a particular island, mountain or habitat type.
Migration and dispersal can change distributions over time. Seasonal movement allows some species to use different areas during breeding and non-breeding periods. Other species expand or contract their ranges as environmental conditions change, although movement may be limited by fragmented habitat.
Protecting wildlife across regions
Conservation needs differ from place to place. A forest species may need connected canopy and protection from hunting; a wetland bird may depend on water levels and undisturbed nesting sites; a marine animal may require safe migration routes and controls on bycatch. A single global solution cannot address every local pressure.
For more on the development of conservation policy, see our article on the history of wildlife conservation. Our guide to the future of wildlife conservation discusses habitat corridors, monitoring and community participation. The key concepts in wildlife ecology article explains the ecological ideas behind these patterns.
Nethep Wiki species profiles such as the giant panda, otter and tortoise offer examples of animals with different habitats and geographic ranges.
Further reading
- IUCN Red List of Threatened Species
- Convention on Biological Diversity: biodiversity and conservation
- National Park Service: migration and connected landscapes
Conclusion
Wildlife around the world reflects the variety of Earth’s environments and the different ways animals use them. Climate, habitat, food, movement and ecological relationships all influence where species can survive. Understanding these differences helps conservation plans fit the needs of particular species and the landscapes on which they depend.