Smallest bird
Mellisuga helenae
57/1.6 dimension(s)
Cuba ()

The smallest bird is the bee hummingbird (Mellisuga helenae) of Cuba and the Isle of Youth. Males measure 57 mm (2.24 in) in total length, half of which is taken up by the bill and tail, and weigh 1.6 g (0.056 oz) Females are slightly larger.

This is believed to be the lowest weight limit for any warm blooded animal.