The Bee Hummingbird holds the title for the smallest bird in the world. Native to Cuba, this bird measures a mere 2-2.4 inches (5-6 cm) in length and weighs around 1.6-2 grams.
Close in size to the Bee Hummingbird, the Vervain Hummingbird is found in Jamaica and Haiti. It averages about 2.5-3 inches (6.3-7.5 cm) in length and weighs around 2 grams. It's known for its slender appearance and relatively short beak.
The Costa’s Hummingbird, native to the southwestern United States and Mexico, measures about 3-3.5 inches (7.6-8.9 cm). It's notable for the male's brilliant purple cap and throat.
The Calliope Hummingbird is the smallest bird in North America, measuring around 3 inches (7.6 cm) in length. It's known for its striking magenta throat feathers in males and green upperparts.
Found in Mexico and occasionally in the United States, the Bumblebee Hummingbird is about 3 inches (7.5 cm) long. It's named for its tiny size and buzzing flight, similar to that of a bumblebee.
The Broad-tailed Hummingbird, which measures about 3.1-3.5 inches (8-9 cm), is known for its broad tail and shimmering colors. It's found in the western United States, Mexico, and Central America.
The Weebill is Australia's smallest bird, measuring around 3-3.5 inches (8-9 cm). It's not a hummingbird but a small passerine bird, known for its short bill and olive-yellow plumage.
Another tiny Australian bird, the Pardalote, measures around 3-3.5 inches (8-9 cm). These birds are known for their distinctive spotted plumage and short tails.
The Goldcrest, Europe's smallest bird, measures around 3.3-3.7 inches (8.5-9.5 cm). It's recognizable by its gold stripe atop its head and is found across Europe and parts of Asia.