Smallest organisms
With a mass of approximately and a length of 5 centimetres (2.0 in), the bee hummingbird ("Mellisuga helenae") is the world's smallest bird species and the smallest warm-blooded vertebrate. Called the "zunzún" in its native habitat on Cuba, it is lighter than a Canadian or U.S. penny. It is said that it is "more apt to be mistaken for a bee than a bird". The bee hummingbird eats half its total body mass and drinks eight times its total body mass each day. Its nest is 3 cm across.
Little friarbird
The little friarbird ("Philemon citreogularis"), also known as the little leatherhead or yellow throated friarbird, is the smallest of the friarbirds within the Philemon genus. It is found Throughout northern and eastern Australia as well as southern Papua New Guinea. It lives a very prominent life whereby it can easily be seen chasing other honeyeaters and is very vocal. However, the little friarbird is usually spotted high up in trees as it rarely is seen on the ground.