Pangolins are the only mammals entirely covered in scales. elaborate share
A toucan's beak is mostly hollow, making it surprisingly lightweight. elaborate share
The aye-aye, a lemur native to Madagascar, uses its elongated middle finger to tap on trees, listening for the sound of insect larvae before gnawing through the wood to extract them. elaborate share
Only female reindeer (caribou in North America) grow antlers. elaborate share
Coelacanths have fleshy, lobed fins that they use to "walk" along the seafloor. elaborate share
Narwhal tusks are actually elongated teeth, and each tusk is unique, like a human fingerprint. elaborate share
Hoatzin chicks have claws on their wings which they use to climb trees. elaborate share
