The adult bird
The value of Hummingbird (Trochilidae) varies quite widely: some growth in small size, others no more than bumblebee.The body is usually stretched, or it seems so because the tail is almost always a long, beak subulate, sometimes equal to the length of the torso, or even longer than his legs Kolibri unusually small and delicate, extremely sharp claws and thin, narrow wings, long, bent in a sickle . 
Nestlings nest!
Humming-bird, with young hatching some goals, and blind, and so helpless that they can barely open the beak, that parents brought food, a few days they are covered with gray gun, and later grow feather on the upper part of the body.