Why birds are called ' glorified reptiles'?

Birds are reptiles. In 2004, a new cladistic classification of "Reptilia" came to include birds.

Aside from their feathers, most birds are characteristically reptilian. Under their feathers are scales, they share similar organ and skeletal systems, and they lay eggs.

The closes living relative of dinosaurs are birds. One of the earliest bird fossils shows evidence of a feathered animal with claws on the ends of its wings and a full set of teeth. Whether it was capable of flight is debated.