Theory:

Class Reptilia:
  • These are animals that have dry scales on their body.
  • They are cold-blooded animals that have lungs as their respiratory organs.
  • They have pentadactyl limbs that are adapted for climbing, running and padding.
  • They are egg laying (oviparous) animals that prefer, sexual reproduction.
Example:
Turtles, Snakes, lizards and crocodiles. Hemidactylus frenatus is the scientific name of house wall lizard. Draco volans is the scientific name of flying lizard.
1024px-European_reptiles_collage.jpg
Class Reptilia
Class Aves (birds):
  • These are warm-blooded animals.
  • The birds have a waterproof skin which is covered with feathers.
  • As they have flight adaptation their bones are spongy with air cavities.
  • They have powerful eyes and their two forelimbs are modified for flight.
  • They are oviparous and reproduce through sexual reproduction.
Example:
All the birds such as Ciconia ciconia (white stork), Aythya fuligula (male tufted duck), Struthio camelus (ostrich), pigeon, sparrow and crow.
Bird_Diversity_2011.png
Class Aves
Class Mammalia:
  • These are terrestrial warm blooded animals.
  • They have an external ear or pinna, a muscular diaphragm, non-nucleated RBC, heterodont and diphyodont dentition.
  • They are viviparous as they give birth directly to the young ones.
Example:
Homo sapiens (Humans), cats, whales, dogs, monkeys.
Mammal_Diversity.png
Class Mammalia
Reference:
https://upload.wikimedia.org/wikipedia/commons/thumb/e/e5/European_reptiles_collage.jpg/1024px-European_reptiles_collage.jpg
https://upload.wikimedia.org/wikipedia/commons/d/d2/Bird_Diversity_2011.png
https://upload.wikimedia.org/wikipedia/commons/c/c3/Mammal_Diversity.png