The bat is the only mammal that can fly.
The Red List from the International Union for Conservation of Nature identifies more than 250 species as endangered, vulnerable or "near threatened."
Bats "see" using echolocation. The animals make high-frequency yells and then they analyze the location of objects around them by perceiving how the sound bounces back.
A tarantula spider can survive for more than two years without food.
Tarantulas have exceptionally slow metabolic rates and are very good at conserving energy when they need to.
So don't worry to much if you go on vacation and you forget to feed yours! However, remember to always leave some water!
Most elephants weigh less than the tongue of a blue whale and a human could crawl through the aorta of these gigantic animal!
An elephant can smell water up to 3 miles away and it's trunk has more than 40.000 muscles!
Only half of a dolphin’s brain sleeps at a time. The other awake half makes the dolphin come up for air when needed to prevent drowning. They are extremely intelligent creatures!
A completely blind chameleon will still take the colors of its environment.
It's a common misconception that they do this to camouflage themselves against a background. In fact, chameleons mostly change color to regulate their temperatures or to signal their intentions to other chameleons.
A Monarch butterfly has 12,000 eyes.
The Monarchs have two different types of eyes, single and compound. The one pair of simple eyes are single chambered and are primarily designed for determining the brightness of light. They are unable to focus on an individual object. The compound eyes are used for their main eye sight. The mechanism of their eyes is similar to that of the human retinas. These Butterflies are also able to see the ultraviolet light, a light that human beings are unable to see.
Hippo’s sweat is pink.
Hippos secrete a reddish oily fluid sometimes called "blood sweat" from special glands in their skin. But the fluid is not sweat. Unlike sweat, which some mammals (including humans) secrete onto their skin, where it evaporates and therefore cools the body, this fluid functions as a skin moisturizer, water repellent and antibiotic. It appears red when exposed to full sunlight, which led the first European discoverers in Africa to call it "blood sweat."
A group of frogs is called an army.
...and when a frog swallows its prey, it blinks, which pushes its eyeballs down on top of the mouth to help push the food down its throat.