3. Bee Hummingbird
Bees are already generally very small, and hummingbirds are also very small birds, but a bee hummingbird? They are tiny! The bee hummingbird is the smallest living bird, found in the archipelago of Cuba, including it’s main island as well as the Isle of Youth in the West Indies. The bird is more commonly found in the mogote area of Cuba, and measures just 5-6 cm, and weighing 1.6-2 g.