This is the smallest bird in North America, measuring about 3 inches long and weighing about one-tenth of an ounce. Despite its tiny size, it is able to survive cold summer nights at high elevations ...

Coming in at number one, the Bee Hummingbird (Mellisuga helenae) not only tops the list of smallest birds in North America, but it is also the smallest known bird in the world. This tiny hummingbird ...

From there, it's another quarter inch up to the calliope hummingbird, which is the smallest bird in North America, wintering in Mexico but flying as far north as Ohio. Still, it's solidly above ...