BIRDS Qn. What are birds?

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BIRDS Qn. What are birds? Birds are animals with feathers on their bodies. Note: Birds are vertebrates that are said to have developed from reptiles. Characteristics of birds

• They have bodies covered with feathers.
• They reproduce by laying eggs.
• Birds undergo internal fertilization.
• Their front limbs are modified into wings for flight.
• Birds have scales on their legs.
• Birds have streamlined bodies to overcome viscosity friction during flight.
• Birds are warm blooded vertebrates.
• Birds breathe through lungs.
• Birds have a nictitating membrane to protect their eyes when flying.

External parts of a bird.