Mammals live in many different habitats, and I wanted to find out about these and how the animals survive.
Mammals live in many different habitats including deserts, the Arctic, oceans, forests, mountains, tundra, grasslands and savannas.
Mammals are incredibly widespread in comparison to reptiles and amphibians. There are also a lot more types of mammals and varying species within those families.
If you go to almost any part of the world, you should find evidence of mammalian activity. But, it might not be the type of mammals you are used to.
Every type of climate, from tropics and deserts to temperate zones and polar regions, has a diverse ecology of mammalian species. Within those climates, you can see a vast range of adaptations and behaviors that separate these animals further.
So what habitats do mammals live in and why are they so widespread?
Why Are Mammals So Widespread?
The diversity of mammals and their ability to colonize so many habitats comes down to a few different factors.
Firstly, mammals showcase some of the broadest examples of physiology. When you look at birds, they all have lots of different bills, sizes, and colorations. But, they are pretty much all creatures with a beak, two wings, and two legs. We can easily see the similarities, even with flightless birds.
With mammals, it is much broader. You can create a line up of a dolphin, lion, elephant, kangaroo, monkey, and rat and struggle to see how they are all related. You can’t even say that they all have the same number of legs or they all have fur. But, they are all creatures with mammary glands with warm blood that provide live young – even if one develops theirs in a pouch.
Having warm blood and four legs are definitely advantages when spreading out across the globe. Warm-blooded mammals are able to regulate their body temperature so well that they have a better chance in extreme temperatures.
Cold-blooded reptiles will shut down if they get too cold and can’t bask in heat to regain their energy. Reptiles will struggle in cold climates. Birds can simply migrate and spend winters in summers in different habitats.
The other reason is that there are so many differences and adaptations in families of mammals.
One of the most successful types of mammal in the world is the fox. They are found, in some form, across most continents and climates. While the red fox is an opportunist that can survive in many locations, others are more specialized for their chosen habitat.
The arctic fox is a polar species that changes its coat in winter. It also has more rounded features and shorter legs to reduce surface area and prevent heat loss and frostbite.
Desert-dwelling foxes are often short and sleek for life on the sand. They have larger ears, for both heat regulation and detecting prey at night. Other features of foxes are still a mystery, such as the square head of the Tibetan fox.
Terrestrial, Marine, And Semi-aquatic Mammals.
One of the reasons that mammals have been so successful in all habits of the world is that they have diversified so much over millennia. The evolutionary tree shows mammals in all kinds of forms over such broad branches.
One example of this is the way that mammals evolved to become either marine, aquatic, or semi-aquatic mammals compared to their terrestrial counterparts.
The most striking examples here are the whales and dolphins. When we grow up, we are at first accustomed to the idea that fish live in the sea, birds in the air, and mammals on the land. But, it isn’t always that simple.
Whales and dolphins are mammalian, with mammary glands and live young. But, they couldn’t look further removed from most land mammals. The limbs became fins, they shed their fur and lived a life in the ocean. The need to surface to breathe distinguishes them from the other non-mammalian creatures of the sea.
Seals, sea lions, and walrus have similarities in their reliance on flippers to propel them through the water, the blubbery buoyant layers, and the lack of fur. However, these aquatic mammals are equipped to spend long periods on land to breed – however clumsy they may appear.
Semi-aquatic mammals, on the other hand, are those that split their time between the land and the water, typically in lakes and rivers. They are well-suited to both, with the form, limbs, and coat of terrestrial mammals but also adaptations for hunting in the water. Their fur is more waterproof, they often have webbed limbs and strong tails, and some can even close their nostrils under the water. Otters and beavers are great examples.
Mammals In Harsh Environments
Wherever you go in the world, you are sure to find some form of mammal in that habitat. Predator and prey creatures will have adapted to find their niche and make the most of the landscape.
On one side of this, you have the mammals found in polar regions. There aren’t many animals that can get by in these environments. But you will find that arctic species tend to have thicker coats in the winter and will blend themselves into the snow.
Polar bears are pure white in color and some of the largest bears so that they have enough fat reserves for winter. Snowshoe hares turn their coat white for winter. Both also have larger-than-average feet to stop them from sinking into the snow.
On the other side, there are all those animals that survive in desert climates. Again, it is just the truly hardy and well-adapted that can handle these conditions.
Common adaptations here include pale fur to blend in with the sand, and potentially to help with heat regulation, and large ears. These ears help them to cool down more because of the number of blood vessels in that surface area.
Many of these smaller mammals will also create dens in which to escape the hottest part of the day and become more active at night.
However, it isn’t just broader climates where you see these changes.
Habitat doesn’t just relate to animals being forest, polar, desert, or plains animals. There are smaller distinctions to be made about the habitat and home range of animals within these areas. Let’s take a woodland or a forest environment for example. There are going to be plenty of terrestrial mammals that are both prey and predator species here.
In a North American forest, you could have bears, bobcats, and wolves wandering the forest floor searching for food. Deer species, rabbits and other prey will make their homes here.
This habitat simply wouldn’t work if all mammals had the same habits and homes. It is all about finding that niche for survival. A place to live, raise young, and find suitable food without competition from other species. So, mammals diversified to take advantage of the environment.
These creatures are known as arboreal species because they spend so much time up in the trees and have become adapted to this life. It is safer up in the trees and they can find fruit and seeds to eat.
They can handle climbing the trunks and leap between branches. In those North American forests, this is a good home for squirrels, porcupines, and chipmunks. In other continents, you will see monkey species at home in trees, as well as species of marten and even a tree kangaroo.
Some arboreal animals have clever adaptations to make life even easier up there. Squirrel species have extra mobility in their ankle joints so they can go head-first down the trunk. Some flying squirrels have flaps of skin to help them glide between trees.
Some species of porcupines and monkeys have prehensile tails to grip branches, almost like having a fifth limb.
Underground And In The Sky
For some creatures, it makes a lot more sense to live your life underground as much as possible. Burrowers include rodents, like voles and shrews, as well as rabbits. They will create networks of burrows with nesting chambers, places to sleep, and food stores. These keep them safe from predators.
Others, such as moles, adapted to spend pretty much all of their time down underground. Moles have lost the need for good eyesight but can easily feel the vibrations of prey like worms. The golden mole is, in fact, completely blind.
Finally, we can’t overlook that a small group took to the sky. Bats are another highly diverse group of animals, with some tiny little species and other massive fruit bats. They do share similar traits. They have developed membranes between their arms and body that act as wings and many use echolocation to hunt for prey at night.
Mammals Live In All Habitats
When you look at the fruit bats gliding through the sky and the gigantic whales in the oceans, you really can find mammals anywhere. No other kingdom has such a range, such a diverse range of creatures or such contrasting adaptations within each habitat.