The smallest bird species, measuring around 5 centimetres long and weighing less than a penny, was discovered in Cuba.
The smallest mammal, with a body length of approximately 3 centimetres and a weight of only 1.8 grammes.
The smallest monkey species in South America, reaching approximately 14 to 16 centimetres in length.
The world's smallest tortoise species, with adults typically measuring 8 to 10 centimetres in length.
The world's smallest fish, located in marshes on the Indonesian island of Sumatra, measures approximately 7.9 millimetres in length.
The smallest antelope species, native to West Africa, stands 25 to 30 centimetres tall at the shoulders.
The world's smallest bat species, often known as the bumblebee bat, has a wingspan of about 15 centimetres and weighs about 2 grammes.