The world is home to 4260 named species of mammals. Mammals, or Mammalia are a class in the Phylum Chordata and the Subphylum Vertebrata. An animal is a mammal if, providing it is female, it can produce milk to feed its young.

11,302 Questions

What are the only mammals that lay eggs?

There are two types of egg-laying mammals. The platypusand the echidna are both egg-laying mammals, or monotremes. They are still classified as mammals because they feed their young on mothers' milk - a characteristic unique to mammals alone.

Within these two types of animals, there are just threeknown species of egg-laying mammals, or monotremes. They are the platypus of Australia; the short-beaked echidna(Tachyglossus aculeatus) of Australia and Papua New Guinea; and the long-beaked echidna (Zaglosssus bruijni) of New Guinea. The echidna is sometimes called the spiny anteater, and there are several sub-species of the long-beaked echidna: the Western long-beaked echidna, Sir David's long-beaked echidna and the Eastern long-beaked echidna.

The Difference Between

What are the differences between mammal and reptile bones?



What could be some advantages of cloning extinct mammals?

You can clone them if you have the DNA and a suitable host mother a close match to the original species. It would be exciting to see a live mammoth...

The biggest advantage to bringing animals back would be to fill niches in the ecosystem that they once inhabited. There are many ecosystems around the world where extinct animals have left holes in the ecosystem which mean that it ceases to function properly. One such instance in the eradication of the large predators in the UK.

Many of these holes could be filled by reintroducing animals from otehr parts of their range where they still exist.

Animals such as the mammoth (more possible as they tended to die in extremely cold places so often some genetic material is left in the body) could be reintroduced into Siberia to fulfill the niche that they evolved to fill

Aquatic Mammals

What is the structure of a marine mammals heart?

Marine mammals, like all other mammals, have a four-chambered heart with a complete divide. The right atrium receives deoxygenated blood from the veins and pumps it into the right ventricle. The right ventricle pumps it into the pulmonary artery, which delivers it to the lungs, where it is oxygenated. The blood then goes to the the left atrium, which pumps it into the left ventricle. The left ventricle pumps the blood into the aorta, which distributes the blood into smaller arteries all over the body.


What is the world's smallest and most ferocious mammal?

Etruscan Shrews may be the most ferocious. They have a bite like a cobra and eat twice their own weight in meat every day. Also, They attack an animal over three times it's size.

The bumble bee (Kitti's Hog-nosed) bat is tailless, and the smallest species of bat. It is also one of the world's smallest mammals. It weighs up to 2 g and is 29 - 30 mm long. It competes for the title of world's smallest land mammal.

Its closest competitor for the title is the Etruscan shrew, which is slightly lighter at 1.2 - 2.7 g, but is longer at 36 - 53 mm (not including its tail). So, depending upon what, smallest, means either of these mammals could be it.


Is there any animal who lays a green egg?

Yes these include the emu and the Ameraucanas chicken.


What are some special features of mammals?

The have a live birth and feed their young on milk

They are also warm-blooded (but so are the birds).

Aquatic Mammals

Which mammal has the longest tooth sea mammal?


Rabbits and Hares

Do rabbits live in deciduous forest?

Yes, the Eastern Cottontail Rabbit is one of the most common.


What are examples of mammals?

Mammals include any of various warmblooded vertebrate animals of the class Mammalia, including humans. They are characterized by a covering of hair on the skin and, in the female, milk-producing mammary glands for nourishing the young.

Some Mammals include:

  • Humans
  • Primates such as apes, chimpanzees, gorillas
  • Dogs and others of the canine family, e.g. wolves
  • Cats and other felines, e.g. lions, ligers, panthers
  • Cows and other farm stock animals, e.g. buffalo, sheep, pigs, goats
  • Horses and other equines such as donkeys and zebras
  • Koalas and other marsupials such as kangaroos, koalas, Tasmanian devils, wombats, etc
  • Marine mammals, e.g. whales, dolphins, porpoises
  • Squirrels and other rodents, such as rats, mice, prairie dogs
  • Bears, e.g. black bears, pandas, polar bears
  • Monotremes (egg-laying mammals) which include just echidnas and platypuses
  • Hippopotamuses
  • Rhinoceroses
  • Insectivores such as moles, shrews and hedgehogs
  • Flying mammals: bats
  • Anteaters and armadillos

Do vampire bats have sonar?

No. SONAR (SOund Navigation And Ranging) is an acronym for a human technology that used for underwater navigation. Bats have the ability that may be similar to SONAR, but they do not use a machine and do not use it under water. They use their ultra sensitive hearing and brain processing to "see" in the dark with sound waves, sort of like how we see with light waves.


Are mammals the only things to produce milk?

As a general rule for the animal kingdom, only mammals produce milk. There are some exceptions for example there is a specie of insect that has milk patches


Why do reptiles lay in the sun?

Reptiles are cold-blooded (endothermic). Put simply, this means they have no means to regulate their body temperature like mammals (and humans) can.

The only way for them to warm up their bodies is to bask on a large rock, or open area, in direct sunlight - thus absorbing the warmth of the suns rays.

Once sufficiently warmed, they are free to go off in search of food etc.

Seals and Sea Lions

How does a harp seal defense itself?

They are fast swimmers and will attack with their claws.

babies are camouflaged


Who is faster a rhino or hippopotamus?

In terms of how fast they can run, the rhino is faster. Rhinos can generally run 40 to 45 mph for short distances versus the hippo's 19 mph over short distances.


Are echinoderms mammals?

No. Mammals belong to the vertebrates group and echinoderms are invertebrates, and have exoskeletons instead.


What is the scientific name for mammals?


Animal Life
Slugs and Snails

What is the slowest moving land animal?

Slugs are actually the slowest moving land animal. Others on that list include sloths, giant tortoises, starfish and manatees.


How can you turn into a cat?

It is not possible to turn into a cat.

The best you can do is to always think about cats and concentrate on them as you're falling asleep. Usually, you will dream about cats. Also, try to learn to lucid dream. Then, you can change yourself into a cat in your dreams and be free.


What is the outer covering of a mammal?

fur or hairs

Chipmunks and Squirrels

What is a full description of a mammal?

Mammals are a class of vertebrates (have a backbone) characterized by warm-blood, hairy bodies, a four-chambered heart, a single jaw bone, sweat glands and - in females - mammary glands for suckling young, middle ear bones and a neocortex (outer layer of the brain).

The mammary glands are modified sweat glands.

Some mammals, such as naked mole rats and whales have lost some or all of their hair. Almost all mammals give birth to live young, but there are a few that lay eggs. These are known as monotremes, and include the platypus

There are more than 4,000 different species of mammals. Mammals range in size from the 30–40 mm (1.2–1.6 in) bumblebee bat to the 33-meter (108 ft) blue whale.


Are all mammals viviparous?

it is true that not all of them are viviparous.


Were are mammals found?



Which is the only mammal that live in water?

The Order Cetacea are the biggest group of mammals that spend their entire lives in the water, this includes whales and dolphins. But there are also manatees, which are mammals but not otherwise related to the cetaceans.

Animal Life

What class of animals are hot blooded?

Avians (birds) and mammals are warm-blooded.


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