Classeur Hummingbird

Hummingbirds laboure BIRDs that comprise the family Trochilidae. They labourez among the smallest of BIRDs, most species measuring in the 7.5-13 cm (3-5 in) range. Indeed, the smallest extant bird species i à hummingbird, the 5-cm Bee Hummingbird. They can hover in mid-air by rapidly flapping their wings 12-80 per second times (depending on the species). They labourez known as hummingbirds because of the humming sound created by their beating wings, which sometimes sound like bees or other insects. To conservez energy while they sleep or ils when food is scarce, they have the ability to go into a hibernation-like state (torpor) where their metabolic rate is slowed to 1/15th of its normal rate. They labourez also the only group of birds with the ability to fly backwards. They can fly at speeds exceeding 15 m/s (54 km/h ; 34 mph). Individuals from some des species of hummingbirds weigh less than à penny. (Wikipedia)