The vervain hummingbird (Mellisuga minima ) is a species of hummingbird found on Hispaniola (split between the Dominican Republic and Haiti) and Jamaica. Its natural habitats are tropical and subtropical moist broadleaf forests and heavily degraded former forests.
It is considered the second-smallest bird in the world after the bee hummingbird. Typical length is 6 cm (2.4 in), including the bill, and weight is 2–2.4 g (0.071–0.085 oz). It also has among the smallest eggs of all birds, with an average length of 1 cm (0.39 in) and weight of 0.375 g.