All kinds of hummingbirds are distributed in the hottest areas of the New World, mainly in South America. They are numerous, but they seem to be only active between the two tropic of cancer. Some of them extend their activities to temperate zones in summer, but they only stay for a short time.
The smallest hummingbird is smaller than a fly, weighing only 2 grams, not as thick as a bumblebee, and its egg weighs 0.2 grams, which is similar to peas. Its beak is a fine needle and its tongue is a thin thread; Its eyes are like two flashing black spots; The feathers on its wings are very thin and seem to be transparent; Its feet are short and small, and it is not easy to be noticed; It is rarely used enough and only stops at night; It keeps flying, fast and buzzing. Its wings flap very fast, so when it stays in the air, it not only keeps its shape unchanged, but also looks motionless. It circled like a helicopter, only to see it stop for a minute in front of a flower and then fly like an arrow to another flower. It sticks its slender tongue into their arms and sucks their nectar, as if this is the only purpose of its tongue.
People saw it madly chasing birds twenty times bigger than it, attaching to them and pecking them repeatedly: let them fly with themselves until it calmed its insignificant anger. Sometimes, hummingbirds have very fierce fights.