10 Smallest Birds in the World Ranked

Costa's Hummingbird
Costa's Hummingbird
HarmonyonPlanetEarth / Flickr / CC by 2.0

The Costa's hummingbird is native to North America's southwest and flourishes in the desert setting. It is one of the smaller hummingbird species at 3 to 3.5 inches long and 0.1 ounces. The male has a brilliant purple plumage across its head.
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