Grade 2, Science Olympiad (CBSE) - Animals classification 

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Grade 2  |   Science  |   Animals classification, Animals, Olympiad, CBSE, ICSE, SOF, ITO

Classification of animals 

 

Classification of animals on habitat:

1. Terrestrial Animals:

Animals which live on land are called terrestrial animals. They generally have four legs. Terrestrial animals have well-developed sense organs. E.g. Tiger, Lion, Elephant, Dogs, Cat etc.

2. Aquatic Animals:

Animals which live in water are called aquatic animals. Many aquatic animals like fishes have special respiratory organs called gills. Gills consists of membranes and are connected with blood vessels. Gills extract dissolved oxygen from water and excrete carbon dioxide.

3. Aerial Animals:

Animals which spend most of their time in the air are called aerial animals. Birds come under this category.

4. Arboreal Animals: 

Arboreal animals live on trees. E.g. monkeys, lizards, squirrel, chameleon etc.

5. Amphibians:

Amphibians can live in water as well as land. Amphibians are cold-blooded. Amphibians don't have scaly skin. Their skin is slimy and permeable that means air and water can pass through it.Some amphibians have gills at the beginning of their life. Some examples of amphibians are frogs, toads, salamanders and caecilians.

 

Classification of animals by feeding habit:

Animals which eat only plants and grass are called herbivorous. They generally have flat, broad teeth. As they eat plants only they are called primary consumers.  E.g. cow, deer etc


Animals which eat other animals are called carnivorous. They have sharp, pointed teeth to tear the flesh of their preys. E.g. tiger, snakes etc


Animals which eat plants, as well as other animals are called omnivorous. E.g. Dog, Beer etc.

 

Mammals

  • Mammals give birth to young ones and don’t lay eggs.
  • Mammals have well-developed lungs.
  • Mammals produce milk to feed their babies.
  • Mammals are warm-blooded.
  • Whale is not a fish but a mammal. Whales give birth to young ones and have lungs for breathing. They don't have gills like fish. They come to the surface of the water to breathe.
  • Dolphins are also mammals and have the same characteristics.
  • Bat is not a bird but a mammal.

Animals which have backbones are called vertebrates.
Mammals, birds, fish, reptiles, amphibians are vertebrates. They have backbones. Insects and worms are not vertebrates.

Animals which lay eggs are called oviparous. Birds are oviparousPenguin is oviparous. Bats are not oviparous. Bats are mammals.

 

Characteristics of reptiles

Following are the characteristics of reptiles :
1) Reptiles are vertebrates, that means they have a backbone.
2) Reptiles have scaly skin.
3) Most reptiles lay eggs except for boa constrictor. Boa gives birth to young ones.
4) Reptiles are cold-blooded.
5) Reptiles breathe with lungs.
6) Most reptiles are four-legged except for snakes.

E.g. of reptiles: snakes, turtles, crocodiles,  lizards, tuatara, chameleon etc.


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 Useful free youtube videos 

Classification of animals on habitat
Note : This video is the property of MakeMeGenius. We really appreaciate the hard work and brain put in by the team of MakeMeGenius to bring out this video. We suggest you to visit their channel on youtube for more science videos. They have a huge collection of informative science videos.


Classification of animals by feeding habit
Note : This video is the property of MakeMeGenius. We really appreaciate the hard work and brain put in by the team of MakeMeGenius to bring out this video. We suggest you to visit their channel on youtube for more science videos. They have a huge collection of informative science videos.


Mammals
Note : This video is the property of Kids Learning Video. We really appreaciate the hard work put in by the team of Kids Learning Video to bring out this video. We suggest you to visit their channel on youtube for more informative videos.


Reptiles
Note : This video is the property of Kids Learning Video. We really appreaciate the hard work put in by the team of Kids Learning Video to bring out this video. We suggest you to visit their channel on youtube for more informative videos.



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