cellular - characterized by or divided into or containing cells or compartments (the smallest organizational or structural unit of an organism or organization); the cellular construction of a beehive; any effective opposition to a totalitarian regime must be secretive and cellular.
They are among the smallest of birds, most species measuring in the 7.5â13 cm (3â5 in) range. Indeed, the smallest extant bird species is a hummingbird, the 5-cm bee hummingbird, weighing less than a U.S. penny (2.5 g). They are known as hummingbirds because of the humming sound created by their beating wings which flap at high frequencies audible to humans.
The smallest hummingbird is the bee hummingbird which only weighs a little less than two grams. The largest hummingbird is known as the giant hummingbird and it weighs between 21 and 23 grams. According to hummingbird expert Laura Erickson, you could mail nine or ten hummingbirds with a single stamp!