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  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 100% liked · 6 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 Some butterflies drink turtle tears In the Amazon, butterflies have been recorded sipping tears from turtles to get scarce sodium and minerals. Animals Behaviors 100% liked · 2 votes
  4. #4 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 100% liked · 2 votes
  5. #5 Termites farm fungus underground Several termite species cultivate fungi that break down plant material into usable food. Animals Insect Societies 100% liked · 1 votes
  6. #6 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 100% liked · 1 votes
  7. #7 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 · 1 votes
  8. #8 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
  9. #9 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
  10. #10 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
  11. #11 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
  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
  13. #13 A horned lizard can squirt blood from its eyes Texas horned lizards can rupture tiny blood vessels near their eyes to spray attackers with a blood jet. Animals Defenses
  14. #14 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
  15. #15 A blue whale's tongue alone weighs as much as an elephant The tongue of a fully grown blue whale can rival the mass of an adult African elephant. Animals Body Quirks
  16. #16 Some Italian towns have outlawed certain dog walks without a leash Several Italian municipalities maintain strict on-leash rules for urban dog walking, with fines for violators. Strange Laws Animals
  17. #17 Polar bear skin is black under their white fur Beneath the translucent fur, polar bear skin is black, which helps absorb sun for warmth. Animals Body Quirks
  18. #18 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
  19. #19 Switzerland requires social pets Swiss law requires that highly social animals like guinea pigs and budgies be kept in groups, not alone. Strange Laws Animals
  20. #20 Trap-jaw ants snap their jaws like springs Trap-jaw ants close their mandibles so quickly that the force can launch them backward. Animals Insect Oddities
  21. #21 Army ants build bridges with their bodies Army ants link together to create living bridges and ramps for the colony. Animals Insect Societies
  22. #22 Manta rays visit cleaning stations Manta rays gather where small fish remove parasites from their skin and gills. Animals Ocean Oddities
  23. #23 Decorator crabs wear living disguises Decorator crabs attach sponges, algae, or anemones to their shells as camouflage. Animals Camouflage
  24. #24 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
  25. #25 Shoebill storks clap their bills like wooden blocks Shoebills make loud bill-clattering sounds during displays, giving them a prehistoric stage presence. Animals Bird Tricks
  26. #26 Aardvarks sit alone on their own mammal branch Aardvarks are the only living species in the order Tubulidentata. Animals Odd Mammals
  27. #27 Hyenas are closer to cats than dogs Despite their dog-like look, hyenas belong to a branch of carnivores closer to cats and mongooses. Animals Animal Families
  28. #28 Manatees are relatives of elephants Manatees and elephants share distant ancestry, visible in traits such as toenails and tooth replacement. Animals Odd Mammals
  29. #29 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
  30. #30 Humpback whale songs can spread like trends New humpback songs can move across populations as whales pick up and repeat changing patterns. Animals Animal Culture

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