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Saturday, 15 February 2014

World Smallest Bird

The Bee Hummingbird (Mellisuga helenae) inhabits Cuba (where people call it zunzuncito) and the Isle of Youth. The bird weighs 1.8 grams, having a length of about 5 cm (2 in). 
 An unaware observer can take this bird for an insect. The bird flies with 80 wing beats per second, a rhythm at which the human retina cannot detect naturally details. During the courtship displays, the male flap his wings up to 200 times per second, the male Bee Hummingbird is the smallest bird, as he is smaller than the female. 

This bird has also the smallest number of feathers: about 1,000 feathers (in other bird species, there are up to 25,000 feathers).
 Its heart rate is the second fastest of all animals, to sustain the high metabolism (explaining its wing rhythm and body temperature). The body temperature is 40�C (104�F), the highest of all birds, but it drops during the night to 19�C (66�F) to save energy (as the bird would lose too much heat because of its small size). Bee hummingbirds eat half their total body mass and drink 8 times their total body mass in water each day.

The nest is attached to small branches using spider web threads. The nest is also world's smallest, no larger than the cup of a doll (3 cm or 1.2 inch in diameter). The nest usually hosts two minute eggs, smaller than two coffee beans. The chicks usually hatch in May-June. 

World Largest Bird
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