Native to Cuba and the Isla de la Juventud, the Bee Hummingbird holds the title for the smallest bird in the world. Adult males weigh about 1.6 to 2 grams, and females are slightly larger.
Also known as Kitti's hog-nosed bat, the Bumblebee Bat is considered the world's smallest mammal. While not a bird, it's worth mentioning for its diminutive size. It weighs about 1.5 to 2 grams and has a wingspan of about 5.7 to 6.1 inches.
The Pygmy Nuthatch is one of the smallest birds in North America. It is found in western regions and weighs around 9 to 12 grams. Despite its small size, it is an active and social bird often found in coniferous forests.
The Goldcrest is a tiny songbird found in Eurasia. It weighs approximately 5 to 7 grams and is known for its bright yellow or orange crest. It is Europe's smallest bird.
Native to the southwestern United States and Mexico, the Elf Owl is one of the world's smallest owls. It weighs around 31 to 58 grams, and adults are about 12 to 14 cm (4.7 to 5.5 inches) in length.
The Weebill is a small bird native to Australia, measuring about 8 to 9 cm (3.1 to 3.5 inches) in length. It is known for its tiny size and distinctive, short bill.
The Long-tailed Tit is a small, adorable bird found in Europe and Asia. Despite its name, the tail can be longer or shorter, but the overall length is around 13 to 15 cm (5.1 to 5.9 inches).
The Verdin is a tiny bird found in the southwestern United States and Mexico. It weighs approximately 5 to 7 grams and has a distinctive yellow head and a short, stubby bill.