14 of the biggest birds on Earth

A group of ostriches taken from below, showing their necks and head, with one looking menacingly at the camera.

Some of the biggest birds on Earth can stand taller than any NBA player and spread their wings wider than kings size bed. 

There are almost 10,000 species of birds on Earth and they come in all different shapes and sizes — from the tiny bee hummingbird to the massive ostrich. Here are 12 of the biggest birds to inhabit our planet, including the tallest, heaviest and those whose wings spread the furthest.