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Mammals include humans and all other animals that are warm-blooded vertebrates (vertebrates have backbones) with hair. They feed their young with milk and have a more well-developed brain than...
- African Elephant
When an elephant drinks, it sucks as much as 2 gallons (7.5...
- Bobcat
Mammals. Diet: Carnivore. Average Life Span In The Wild: 10...
- Giant Panda
High in dense bamboo forests in the misty, rainy mountains...
- Coyote
Coyotes once lived only in prairies and deserts of the...
- Chipmunk
Chipmunks are part of the squirrel family, and while they...
- Asian Elephant
A three-foot-deep watering hole in northeast India hums with...
- Black Rhino
Mammals. Diet: Herbivore. Size: Height at shoulder: 4.5 to 6...
- Black Bear
Balanced on a rock in the middle of a river, a black bear...
- Brown Bear
During the fall, a brown bear eats practically around the...
- Eastern Gray Squirrel
There are more than 200 species of squirrels living all...
- African Elephant
A mammal is an animal that breathes air, has a backbone, and grows hair at some point during its life. In addition, all female mammals have glands that can produce milk. Mammals are among the most intelligent of all living creatures. Mammals include a wide variety of animals, from cats to humans to whales.
Discover fun (and furry!) animal facts about our planet’s incredible wildlife. From majestic mammals, soaring birds, super sea creatures & creepy crawlies!
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- Main Characteristics
- Main Groups
- Modes of Life
- Taxonomy
- Images For Kids
Reproductive cycle
Most marsupial and eutherian mammals have a reproductive cycle known as the oestrous cycle (U.S: estrous cycle). Females are sexually active only during the oestrous stage, when they are 'on heat' for a few days each month. If an ovum is not fertilised, the endometrium (uteruslining) is resorbed. Oestrus cycles may occur once or twice a year, or many times a year. Each group of mammals has its own frequency. Humans and primates, are quite different. They have a menstrual cycle. In this case,...
Skeleton
One diagnostic feature is the lower jaw which, unlike earlier forms, is composed of a single bone, the dentary. This is one feature which can be seen in fossils, or at least those which are complete enough to have the lower jaw. Mammals have three little bones in their inner ear, the ear ossicles. The ear ossicles are bones which were, long ago, part of the lower jaw in early proto-mammals. There are quite a number of other features, particularly in the skull and limbs, so that it is usually...
Neocortex and behaviour
Another diagnostic feature is the neocortex of the brain, which no other vertebrate has. This is involved in the kind of flexible behaviour and learning typical of mammals. Reptiles and birds have much of their behaviour controlled by "inherited behaviour chains", which roughly translates as "instincts". Almost all animals can do some learning, but mammals do far more than other vertebrates. Their behaviour is much more flexible than lizards, for example, and that is made possible by their ne...
Almost all mammals give birth to live young. There are only two mammals that lay eggs, called monotremes, the duck-billed platypus Ornithorhynchus, and the spiny anteater Echidna, with four species. All are confined to Australia and New Guinea, and are the sole survivors of an earlier group of mammals. However, like other mammals, they feed milk to...
In terms of number of species mammals, with 5488 species, are not the most successful vertebrates. Birds, with about 10,000 species have nearly twice as many, and reptiles have just as many as birds. Fish have even more species. There are 27,000 species of fish, of which nearly 26,000 are bony fish. Despite this, many zoologists do regard mammals a...
The evolutionary relationships among land vertebrates is as follows: 1. Tetrapoda (land vertebrates) 1.1. Amphibia(lay eggs in water) 1.2. Amniota (lay cleidoic eggs) 1.2.1. Sauropsida (all true 'reptiles') 1.2.2. Synapsida (all 'mammal-like amniotes') 1.2.2.1. Pelycosauria 1.2.2.2. Therapsida 1.2.2.2.1. Mammalia(bear live young; milk; raise their ...
The original synapsid skull structure contains one temporal opening behind the orbitals, in a fairly low position on the skull (lower right in this image). This opening might have assisted in conta...Restoration of Juramaia sinensis, the oldest known Eutherian(160 M.Y.A.)Fossil of Thrinaxodon at the National Museum of Natural HistoryMammal skin: 1 — hair, 2 — epidermis, 3 — sebaceous gland, 4 — Arrector pili muscle, 5 — dermis, 6 — hair follicle, 7 — sweat gland, 8 (not labeled, the bottom layer) — hypodermis, showing round a...There are over 5,000 species that live all over the earth, from the smallest bumblebee bat to the largest blue whale and even humans. We have everything kids need to know about mammals. Learn characteristics, where they live, and what they eat with these amazing mammal facts for kids.
