1 Bee HummingbirdBee Hummingbird (Mellisuga helenae) is the smallest bird in the entire world and grabs top spot in this list. Native to Cuba, this tiny bird is 5.5cm long and its weight is around 1.6-1.8grams. The male bee hummingbird is smaller in size. Female lays two eggs at a time, being the size of a pea.
2 The Weebill(Smicrornis Brevirostris)Native to Australia, the Weebill(Smicrornis Brevirostris) is the second smallest living bird in the world, with most species measuring in the 8 to 9 cm range. The Weebill weight is around 6 grams and has light brown feathers and yellowish underparts. They spend most of their time searching for insects and larvae in the woods, trees, etc. Female lays two or even three cream-colored eggs at a time.