Birds are characterized by having beaks, feathers, wings, and two legs. Most birds can fly, but not all; penguins and ostriches are some well-known examples of this exception.

There are numerous different species of birds all around the world, and today it is mostly agreed that all birds descend from one particular species of dinosaur.

The study of birds is called ornithology. Ornithologists have abundant knowledge about how birds are divided into different families, where in the world they can be found, and which birds sing in this or that way.

Keynotes about birds look into subjects like these and more.