There are more than 18,000 different species of birds in the world.

The ostrich is the world’s largest bird. They typically stand around seven to nine feet tall and can weigh more than300 pounds. They also lay the biggest egg of any bird.

The Kiwi bird of New Zealand lays the largest egg relative to its body size. A single egg can weigh as much as one-fifth of the entire weight of an adult bird. Kiwi eggs are also among the most nutritious, as 60% of their contents are yolk.

There are more than three times as many chickens in the world as there are human beings.

The world’s smallest bird is the Caribbean Bee Hummingbird. Also known as the zunzuncito, it is barely two inches long from tail to beak, and adults weigh less than a tenth of an ounce.

Birds are the only living creatures to grow feathers.

The peregrine falcon is thought to be the world’s most widely distributed bird. They can be found on every continent except Antarctica.