The bee hummingbird, native to Cuba and Isla de la Juventud, is the smallest bird in the world. Adult males typically measure around 2 to 2.4 inches (5.1 to 6.1 cm) in length and weigh only about 1.6 to 1.9 grams.
This species of hummingbird is found in Mexico and Central America. It's slightly larger than the bee hummingbird, with males measuring about 2.4 inches (6.1 cm) in length.
Vervain hummingbirds are found in Jamaica. They are one of the smallest birds in the world, with males measuring around 2.4 inches (6.1 cm) in length.
Similar in size to the bee hummingbird, the Cuban hummingbird is also native to Cuba and Isla de la Juventud.
Found in parts of Africa, the pygmy kingfisher is one of the smallest kingfishers in the world, measuring around 4 inches (10 cm) in length.
Native to Europe and Asia, the goldcrest is one of the tiniest birds in Europe, measuring about 3.5 to 4.3 inches (9 to 11 cm) in length.
The elf owl, native to the southwestern United States and Mexico, is one of the smallest owls in the world, measuring about 4.9 to 5.7 inches (12.5 to 14.5 cm) in length.
These small birds are found in Europe and Asia. They measure approximately 4.7 to 5.5 inches (12 to 14 cm) in length.
Native to the Americas, the lesser goldfinch is one of the smallest finches in North America, measuring about 3.9 to 4.7 inches (10 to 12 cm) in length.