There are a plethora of animals on this planet. Chances are you know about a wide variety of them, but have you really seen it all? We doubt it, which is why we decided to roundup 17 of the most adorable creatures you didn't know existed until this very moment. Scroll below to meet them all.

Long-tailed tit: The long-tailed tit is easily recognisable with its distinctive colouring, a tail which is bigger than its body, and undulating flight. Gregarious and noisy residents, long-tailed tits are most usually noticed in small, excitable flocks of about 20 birds. Like most tits, they rove the woods and hedgerows, but are also seen on heaths and commons with suitable bushes. The type of long-tailed tit that looks like tiny cotton candy is common in Japan. They grow to be around 6 inches and they are very acrobatic: they hang upside down from time to time in search of food.

Coati: Coatis are mammals that live in South America, Central America, Mexico, and the southwestern United States. When a coati sleeps, it tucks its nose into its belly. This sounds sweet, but it is for defense. When provoked, they can be fierce fighters — coatis have strong jaws and sharp canine teeth.

American marten: The American marten is native to the forests of northern North America. They mainly live on trees, but they're also great swimmers that are even able to swim underwater. Commonly referred to as the pine marten, the American marten was once believed to be extirpated in Michigan but now has a healthy population. Records show the American Marten extirpated in the 1930s. However, efforts for their recovery began as early as 1958 and then redoubled in the 1970s. After a recent review of the endangered species list, the marten was deemed recovered with a sustainable population.

Ezo Momonga: These cuties are from Japan as well. They're about 8 inches in length, and have a membrane between their ankles and wrists so they can glide. They hide in holes during the day and come out at night to forage for food. The Ezo momonga can definitely fit inside one's pockets as its total length on average is only around 13 inches (330 mm). Their body length makes up about five to eight inches (127 to 203 mm) of their total length, while their tail length makes up about 3.5 to 5.5 inches (90 mm-140 mm). As the Japanese are lovers of all things kawaii, the Ezo momonga has found some popularity among locals.

Pika: Pikas dwell in the mountains of Asia and North America. They live in cold temperatures and can die if the temperature gets to be above 77.9°F (25.5°C). The American pika, a pint-size rabbit relative, is feeling the heat: Hotter summers induced by climate change are threatening these cute creatures' habitats throughout the western United States.

White weasel: They may look tiny, but don't fall for it — weasels are active predators. Interestingly, different kinds of weasels live everywhere in the world except for Australia, Antarctica, and their neighboring islands. Ermine is the common name given to this small northern weasel with a short, black-tipped tail, long body and short legs. Its fur is dark brown in summer but white in snowy, winter conditions. The white fur is called "ermine," and even where the animal called a "stoat," when it has its winter coat it may be known as ermine, or being "in ermine." Commercially, this animal has been of importance for the fur trade, particularly its valuable winter coat of white. This highly prized fur has been used to adorn royal robes in Europe and in art was used as a symbol of virginity or purity.

African Pygmy Falcon: The African pygmy falcon lives in eastern and southern Africa. Being only 8 inches long, it's the smallest raptor on the continent. As the smallest raptor in Africa—adults are about the length of a sharpened pencil—this species is a fearless hunter and courageous nest defender. The African pygmy falcon is small but mighty! (And super cute.) They form interesting living arrangements: rather than construct their own roost, they prefer to take over a few chambers of a spacious, communal weaver bird nest. With their hunting prowess, the pygmy falcons are beneficial nest guests, cutting down on snakes and other predators in the area. There are two two species of pygmy falcon: the white-rumped Polihierax insignis and the African P. semitorquatus. The latter species is at the San Diego Zoo and the Safari Park.

Sand cats live far from water sources, in sandy and stony deserts. They are widely distributed in the Arabian peninsula and the Middle East, and are listed as Least Concern on the IUCN Red List, so they are totally fine. Sand cats may remind you of adorable domestic kittens, but don't be deceived they are fierce predators. They primarily eat small rodents, but they are opportunistic feeders and will also hunt birds, hares, and insects. They often even go after snakes without fear, particularly venomous vipers.

Blue-footed booby: It is s a marine bird living in the regions of the eastern Pacific Ocean. The brightness of their feet is dependent on their age and fades over time. Females tend to mate with younger males who have brighter feet. Blue-footed boobies are one of three booby species found on Galapagos. They are large, distinctive birds, found along the Eastern Pacific coastline where they often nest on small islands with rocky coasts. Their name comes from the Spanish word 'bobo', meaning foolish or clown – referring to their clumsy movement on land. Their plumage is brown on top, with a white rump and black tail, whilst their underparts are white. The most distinctive characteristic of the blue-footed booby is its large blue feet, which play an important role in courtship. Females are thought to select males with brighter feet, as they are an indicator of his overall condition and thus the quality of his genes. Females tend to be larger than males, and have darker blue feet.

Short-eared elephant shrew: These are small (around 6 inches cm long) mammals native to Africa. Elephant shrews are one of the fastest small mammals, and they've been recorded to reach a speed of 17.9 mph (28.8 km/h). Despite their small size, they're more closely related to elephants than to shrews. Short-eared elephant shrews clean themselves with dust baths. Their long tails are lined with knobbed bristles. The exact function of the bristles is unknown, but they may be used like swabs to spread their scent.