The smallest living bird is the bee humming bird from Cuba, which is only 6 cm long and weighs 3 g. A long slim beak takes up nearly half of its length.
Hummingbirds use their long tongue to feed on flower nectar, which they sip while in hovering flight. Their wings beat 80 times per second while they are hovering.
Hummingbirds are able to fly backwards and sideways as they manoeuvre to
Picture credit: google