7. Most hummingbirds weigh less than a nickel.
Hummingbirds are incredibly lightweight. The average hummingbird is around 4 grams (one gram less than a nickel), while the smallest, the bee hummingbird, is closer to 1.6 grams, less than the weight of a penny. The largest member of the family, meanwhile, the giant hummingbird, can get up to 24 grams—enormous for a hummingbird, but only equivalent to about a handful of loose change.