A vervain hummingbird (Mellisuga minima) photographed at Strawberry Hill in Jamaica. This species, which can also be found in the Dominican Republic and Haiti, is the second-smallest bird in the world after the bee hummingbird. It has an average length of 6 cm (2.4 in), including the bill, and weight of 2โ2.4 g (0.071โ0.085 oz).Photograph: Charles J. Sharp