1. Bee Hummingbird (Mellisuga helenae) The Bee Hummingbird, native to Cuba, is the world’s smallest bird, measuring just 5-6 cm (2-2.4 inches) in length and weighing around 1.6-2 grams. Despite its small size, it is known for its vibrant iridescent plumage, with males displaying a bright red throat and blue upper parts during the breeding […]