The Bee Hummingbird is the smallest bird in the world. These tiny hummingbirds are native to Cuba and the Isla de la Juventud and measure about 2 to 2.4 inches (5 to 6 cm) in length and weigh only 1.2 to 2.0 grams.
Found in Mexico, the Bumblebee Hummingbird is another extremely small hummingbird species. It's just slightly larger than the Bee Hummingbird, with a length of about 2.4 to 2.8 inches (6 to 7 cm).
Native to New Guinea, the Buff-breasted Pygmy Parrot is one of the tiniest parrot species in the world. These parrots measure around 3.2 to 3.5 inches (8 to 9 cm) in length.
The Goldcrest is the smallest bird in Europe and is found throughout the continent. It measures about 3.3 to 3.7 inches (8.5 to 9.5 cm) in length.
This small bird is native to North America and measures approximately 3.7 to 4.3 inches (9.5 to 11 cm) in length.
The Eurasian Wren is a widespread bird in Europe and Asia. It is about 3.9 to 4.3 inches (10 to 11 cm) long.
Found in South America, the Short-tailed Pygmy Tyrant is a tiny bird with a length of approximately 4 inches (10 cm).
Native to North and South America, the Least Goldfinch measures around 4 to 4.3 inches (10.2 to 11 cm) in length.
This tiny hummingbird species is found in Central and South America and has a length of about 4.3 inches (11 cm).