Etruscan Shrew: Also known as the white-toothed pygmy shrew, it holds the title for the smallest mammal by mass, weighing only about 1.2 to 2.7 grams.
Bee Hummingbird: Found in Cuba, this tiny bird is the smallest living bird species, with males measuring around 5 centimeters in length and weighing less than 2 grams.
Paedocypris Progenetica: This fish species, found in Southeast Asia, holds the title for the smallest vertebrate, with females measuring only about 7.9 millimeters in length.
Speckled Padloper Tortoise: Native to South Africa, this species of tortoise is one of the world's smallest, with adults measuring around 6 to 10 centimeters in length.
Pygmy Marmoset: Known as the world's smallest monkey, these tiny primates are found in South America, with adults weighing around 100 grams and measuring about 14 to 16 centimeters in length.
Royal Antelope: Native to West Africa, this species of antelope is one of the smallest hoofed animals, with adults standing about 25 to 30 centimeters tall at the shoulder.
Fairyfly: These tiny parasitic wasps are among the smallest insects in the world, with some species measuring less than 0.2 millimeters in length.
Brookesia Micra: Found in Madagascar, this species of chameleon holds the title for the world's smallest reptile, with adults measuring around 2.9 centimeters in length.