1. Mellisuga helenae Hummingbirds are the smallest birds on Earth and the world's smallest warm-blooded animals, but they have great energy. The honey-sucking honeybeam is found only on the Cuban islands of Central America and is endemic to Cuba. The little guy is only 6 centimeters long and weighs 1.7 grams, but he has to eat nectar and insects of his own weight every day. Hummingbirds are more like helicopters than birds, they can fly at speeds of 40 to 50 kilometers per hour, and their wings can rotate 180 degrees, either backwards or hovering in the air.
The beak of the hummingbird is as slender as a needle and the tongue is like a thin thread, which is particularly suitable for feeding on long-barreled flowers, which can feed on 1500 flowers in a day.
2, the thin blind snake (Leptotyphlopidae) The thin blind snake, also known as the clematis snake, is the smallest snake in the world, only about 10 cm long. They inhabit a wide range of habitats, from rainforests to semi-desert areas, from termite burrows to tall treetops, almost everywhere, throughout North and South America, Africa and Asia. Slender blind snakes live mainly in dark caves, feeding on ants and termites, and over time their eyes degenerate. This snake has a magical ability to secrete chemicals that confuse termites and allow them to enter their nests. After entering the nest, they will eat the eggs and larvae of the termites, and they will also suck the body of the termite like a milkshake, leaving only a layer of "skin" on the outside.
3, fat baby fish (Schindleria brevipinguis), also known as Stott miniature fish, its shape is slender, looks like a small bug, they have no fins, no teeth, no scales. The body has no pigmentation except for the eyes, and the whole body is transparent. Females spawn when they are 2 to 4 weeks old, and the "fat baby fish" generally live about 2 months, and are known as the "smallest fish in the world". In the latest issue of the Journal of Research published at the Australian Museum on 8 July 2004, Australian scientists officially announced that they had identified the world's smallest and lightest fish. This fish is only about 7 mm long, weighs 1 milligram, and can only make up 1 kg with a million pieces, which is a well-deserved "small character" among vertebrates. Relevant scientists have registered the fish as a new species and declared the Guinness Book of Records as the smallest vertebrate. The average male is only 7 mm long, and the average female is about 8.4 mm long, and it is estimated that even the smallest hook will not be able to swallow for them. In addition to gobies and fat baby fish, there are two other kinds of fish that are also very fish, and Guojing has become the smallest fish in the world.
4. The smallest amphibian and vertebrate in the Paedophryne amauensis boundary is a frog less than 8 mm long. Found in New Guinea in 2009, the Ama utong frog lives in the deciduous layers of the rainforest floor, has a very similar body color and ring, feeds on small invertebrates, and has a similar call to an insect.
This little frog is born a "little frog" and completely skips the tadpole stage.
The Amaław frog is very good at jumping, and can reach 30 times its length in a single jump.
5, Thai pig-nosed bat (Craseonycteris thonglongyai) The world's smallest bat is only 2.5 cm long and weighs about 2 grams, which looks about the size of a bumblebee. But strangely enough, they have a pig nose, so they are called pig-nosed bats. This small mammal has 28 teeth and large ears, sharp claws on its thumbs, and is good at hovering in the air. Thai pig-nosed bats live in limestone caves along rivers in Thailand and Myanmar, and often hunt for insects and spiders in farmland and bamboo forests. They use echoes to find targets and are very good at catching insects while flying. However, the population of such bats is declining due to fewer caves and forests available for survival.
Pig-nosed bats have a thin layer of haze between their two hind legs, which facilitate flight and predation of insects.