BEST OF WEIRD.NET
🧠

Best Animals Facts

Top Weird Facts, ranked by Weird.net users. Join free →

  1. #1 Octopuses have three hearts Two pump blood through the gills, the third pumps it through the rest of the body — and when an octopus swims, the main heart stops beating, which is why they prefer crawling. Animals 86% liked · 7 votes
  2. #2 Earthworms have multiple hearts A common earthworm has five pairs of aortic arches that act like simple hearts to pump blood. Animals Body Quirks 83% liked · 6 votes
  3. #3 Platypuses hunt by sensing electricity A platypus closes its eyes and ears underwater and uses sensors in its bill to detect tiny electric signals from prey. Animals Odd Mammals 75% liked · 4 votes
  4. #4 Flamingos feed chicks a milk-like crop fluid Both flamingo parents can produce a red, nutrient-rich crop milk for their chicks. Animals Bird Tricks 67% liked · 3 votes
  5. #5 Squids have donut-shaped brains A squid's esophagus passes through the middle of its ring-shaped brain, so swallowing big chunks could damage it. Animals Body Quirks 100% liked · 2 votes
  6. #6 Sea otters keep favorite rocks in loose skin pouches Sea otters can store a tool rock in a fold of skin under the forearm while diving. Animals Tool Use 100% liked · 2 votes
  7. #7 Octopus arms can taste what they touch Octopus suckers contain chemical sensors, so their arms can explore flavor and texture directly. Animals Ocean Oddities 100% liked · 2 votes
  8. #8 Starfish can regrow lost arms Many sea stars can regenerate arms, and some species can regrow much of the body from a remaining piece. Animals Regeneration 100% liked · 2 votes
  9. #9 Pistol shrimp stun prey with a sound bubble A pistol shrimp snaps one claw to create a cavitation bubble loud and forceful enough to stun small prey. Animals Ocean Oddities 100% liked · 2 votes
  10. #10 Female lions do most of the hunting In a pride, the lionesses cooperate to take down most large prey while males defend territory. Animals Hunting 100% liked · 1 votes
  11. #11 A cassowary kick can break bone Cassowaries have dagger-like inner claws and can deliver kicks powerful enough to seriously injure a person. Animals Defenses 100% liked · 1 votes
  12. #12 Bats are the only mammals capable of true flight Other mammals like flying squirrels glide, but only bats have powered, flapping flight. Animals Unique Mammals 100% liked · 1 votes
  13. #13 Termites farm fungus underground Several termite species cultivate fungi that break down plant material into usable food. Animals Insect Societies 100% liked · 1 votes
  14. #14 European eels travel to the Sargasso Sea to spawn After years in rivers, European eels migrate across the Atlantic to reproduce in the Sargasso Sea. Animals Animal Journeys 100% liked · 1 votes
  15. #15 Emperor penguins rotate through warm huddles Penguins on the cold outside of a huddle gradually move inward so no bird stays exposed too long. Animals Cold Survivors 100% liked · 1 votes
  16. #16 Archerfish shoot insects with water Archerfish knock prey from branches by aiming precise jets of water from below the surface. Animals Fish Tricks 100% liked · 1 votes
  17. #17 Immortal jellyfish can rewind their life cycle Turritopsis dohrnii can transform from an adult medusa back into a younger polyp stage under stress. Animals Ocean Oddities 100% liked · 1 votes
  18. #18 Axolotls can regrow limbs Axolotls can rebuild legs, tails, parts of the heart, and even sections of spinal cord without ordinary scarring. Animals Regeneration 100% liked · 1 votes
  19. #19 Cleaner wrasses run underwater service stations Cleaner wrasses pick parasites from client fish, and clients often queue for the service. Animals Animal Jobs 0% liked · 3 votes
  20. #20 Tardigrades can dry into a survival tun Tardigrades can curl into a dehydrated tun state that helps them survive vacuum, radiation, and extreme cold. Animals Tiny Survivors 33% liked · 3 votes
  21. #21 Reindeer eyes shift color with the seasons Reindeer eyes appear gold in summer and a deep blue in winter, an adaptation to the long polar night. Animals Body Quirks 0% liked · 1 votes
  22. #22 Poison dart frogs carry tadpoles to tiny pools Some poison dart frog parents transport tadpoles on their backs to small water pockets in plants. Animals Parenting 0% liked · 1 votes
  23. #23 Kangaroos use their tails like a fifth leg When moving slowly, kangaroos plant their tail with their front limbs to form a stable tripod. Animals Odd Mammals 0% liked · 1 votes
  24. #24 Goblin sharks can sling their jaws forward A goblin shark's jaws shoot outward to grab prey in a strange, fast extension. Animals Deep Sea 0% liked · 1 votes
  25. #25 Parrotfish help make beach sand Parrotfish grind coral while feeding and excrete fine sand that can become part of tropical beaches. Animals Ocean Oddities 0% liked · 1 votes
  26. #26 Narwhal tusks are teeth A narwhal's spiral tusk is an elongated canine tooth with nerve endings running through it. Animals Ocean Oddities 0% liked · 1 votes
  27. #27 Greenland sharks may live for centuries Greenland sharks grow slowly in cold water and are among the longest-lived vertebrates known. Animals Deep Sea 0% liked · 1 votes
  28. #28 Some butterflies drink turtle tears In the Amazon, butterflies have been recorded sipping tears from turtles to get scarce sodium and minerals. Animals Behaviors
  29. #29 Otters keep favorite rocks in armpit pockets Sea otters often store a treasured tool rock in a loose skin pocket under one forearm. Animals Tool Use
  30. #30 Bees can recognize individual human faces Trained honeybees can be taught to distinguish photographed human faces from one another in lab experiments. Animals Smart Animals

Want personalized picks?

These are global rankings. Sign up to see what your Taste Twins recommend — usually wildly different from the global top.

Create free account → Take a 60-second taste quiz first