Bee Hummingbird is the smallest bird in the world. Males of the bee hummingbird living on Cuba and on Isla de la Juventud, 5.5 cm long, weigh 1,6 g, and their length is 5,7 cm, Half of length make a tail and a beak. Females are a bit larger. They are very mobile, fervent and unaccomodating birds; also they are extremely courageous in attacks on the larger birds, especially in period when they care of baby birds. They fly extremely fast – up to 80 km/h. They doing to 80 swings in a second. At rest the heart of the hummingbird usually work with frequency of 500 blows in a minute, and during physical activity of 1200 and more beats in a minute. The maximum life expectancy of the hummingbird is 8 years. They eat every ten minutes. Skins of the hummingbird are used as an ornament that’s why people had exterminated a lot of kinds of hummingbirds.
