Bee Hummingbird (Mellisuga helenae):
– Found in Cuba, the Bee Hummingbird is the smallest bird in the world, measuring around 2 inches (5 cm) long and weighing less than a penny.
Pygmy Marmoset (Cebuella pygmaea):
– Native to South America, the Pygmy Marmoset is the smallest monkey in the world, with adults weighing around 3.5 ounces (100 grams) and measuring about 5 inches (13 cm) in length.
Etruscan Shrew (Suncus etruscus):
– The Etruscan Shrew holds the title for the smallest mammal by mass, weighing just 1.2 to 2.7 grams and measuring around 1.5 to 2 inches (3.8 to 5.5 cm) in length.
Paedocypris progenetica:
– Found in swamps on the Indonesian island of Sumatra, Paedocypris progenetica is the smallest known fish species, with adult females measuring about 0.3 inches (7.9 mm) in length.
Frog species (Paedophryne amauensis):
– Discovered in Papua New Guinea, the Paedophryne amauensis is the world's smallest known vertebrate, with adults measuring around 0.3 inches (7.7 mm) in length.
Bumblebee Bat (Craseonycteris thonglongyai):
– Also known as Kitti's Hog-nosed Bat, the Bumblebee Bat holds the title for the world's smallest mammal by skull size, with adults weighing just around 0.07 to 0.1 ounces.
Speckled Padloper Tortoise (Homopus signatus):
– Native to South Africa, the Speckled Padloper Tortoise is the world's smallest tortoise species, with adults typically measuring around 2 to 3 inches (5 to 8 cm) in length.