Swans are undoubtedly some of the most elegant and iconic birds in the animal kingdom. While most people are familiar with their graceful, long necks and white feathers, there are many other fascinating and surprising facts about swans and other animals that you may not know. Here are just a few fascinating animal facts that are sure to pique your interest:

1. Swans are the tallest geese species

Even though they are often referred to as “waterfowl,” swans are actually a type of goose. They are the largest and heaviest of the waterfowl family, and they are easily recognizable by their long necks and curved beaks. Swans can grow up to five feet tall and can weigh up to 30 pounds, making them the tallest geese species in the world.

2. Sloths only poop once a week

Sloths are known for being slow and lazy, but did you know that they only go to the bathroom once a week? That’s right – these adorable, tree-dwelling mammals have a very slow metabolism, which means they don’t need to eat very often. As a result, they only need to defecate once every seven days or so.

3. Polar bears are actually black

When you think of polar bears, you probably picture a creamy white bear with jet black eyes and a black nose. However, polar bears are not actually white – their fur is actually translucent, and it appears white because it reflects light. Underneath their fur, polar bears have black skin, which helps them absorb heat from the sun and stay warm in their frigid Arctic habitat.

4. Kangaroos can’t walk backwards

Kangaroos are known for their ability to hop great distances – they can cover up to 25 feet in a single leap. However, these hopping marsupials are incapable of walking backwards. Their hind legs are incredibly strong and muscular, which allows them to hop forward with ease. But because of the way their legs are structured, they simply can’t move backwards.

5. Camels can close their nostrils

Camels are incredibly adaptable creatures that are well-suited to life in the harsh deserts of Africa and the Middle East. To help them deal with sandstorms and other environmental challenges, they have a few unique features, including the ability to close their nostrils. When a sandstorm kicks up, a camel can close its nostrils to prevent sand from entering its nose and airways.

There are countless fascinating facts about animals that most people never learn. From the swan’s unique place in the goose family to the sloth’s infrequent bathroom habits, there is always something surprising to learn about the animal kingdom. Next time you encounter a creature in the wild, take a moment to appreciate all of the amazing things that make it unique.