Defense
14 questions tagged Defense — spanning every one of the seven Ws.
Why do armadillos wear armor?
Armadillos have bony plates because armor evolved as protection against predators. Their tough shell is made from bone covered by keratin, the same material found in hair and nails.
Why do porcupines have quills?
Porcupines have quills for defense against predators. The quills are modified hairs with barbed or stiff structures that make them hard to remove.
Why do hedgehogs curl into a ball?
Hedgehogs curl into a ball to protect their vulnerable face, belly and legs with spines. The posture turns them into a difficult target for many predators.
Why do pufferfish inflate themselves?
Pufferfish inflate by swallowing water or air to look bigger and harder to eat. Many species also carry powerful toxins, making them dangerous prey.
Why do jellyfish sting us?
Jellyfish sting to capture prey and defend themselves using tiny stinging cells called nematocysts. These cells fire harpoon-like threads that inject venom on contact.
Why do armadillos have hard armor plates?
Armadillos evolved bony plates as protection from predators. Their armor is made of bone covered with tough skin, giving them a flexible but protective shell.
Why do opossums play dead?
Opossums play dead as a defense strategy when escape or bluffing fails. The behavior can confuse predators and make the animal seem unappetizing or already dead.
Why do stink bugs release such a strong smell when disturbed?
Stink bugs secrete defensive chemicals from glands to discourage predators. The odor is a warning signal and a survival tool.
Why do tarantulas have urticating hairs?
Many New World tarantulas use irritating hairs as a defense against predators. The hairs can be kicked off and cause discomfort or irritation.
Why do wasps sting more than once, while honeybees usually sting once?
Many wasps have smooth stingers that can be used repeatedly, while honeybees have barbed stingers that lodge in skin. The sting structures evolved differently for defense.
What is caudal autotomy in lizards?
Caudal autotomy is the ability of many lizards to drop their tail to escape a predator.
What is a poison dart frog?
A poison dart frog is a small brightly colored frog known for toxic skin compounds that can deter predators.
How do caterpillars protect themselves before they become butterflies?
Caterpillars use camouflage, toxins, spines, and other defenses to avoid predators. Many species also hide in leaves or silk shelters.
How do sea cucumbers defend themselves without shells or teeth?
Sea cucumbers use several defenses, including tossing out sticky internal organs or firing defensive threads. They can also make their body stiff or slippery to escape predators.