Hummingbirds

Among all birds Hummingbirds are the smallest. The interesting fact about the hummingbird is they flap their wings 11-90 times per second. Hummingbirds can fly in the speed of 54 km/h. These birds need lot of energy to fly as their heart beats 1,260 times per minute. So they visit 1000 of flowers every day, they also eat smal insects. The hummingbirds brain weight is 4.2% of it whole body weight, that is the largest, when compared with the bird kingdom. These are the only species which can fly backwards which no other birds can do. On an average a hummingbird live for 3 to 5 years. Even though many hummingbirds die in one year at the time of leaving the nest.