What Really Happens When You Spray a Spider With Bug Spray?

You spot a spider on the wall and hit it with a cloud of bug spray. It twitches, falls, curls its legs... and hours later it might stand up and walk away. Why does a spray made to kill bugs struggle with spiders? Household sprays use pyrethroids, built for insects that breathe through open holes called spiracles, so the mist floods a fly in seconds. Spiders breathe through book lungs hidden behind slits lined with water-repellent hairs, so the poison has to soak slowly through the skin to reach the nerves. There it jams sodium gates open and the nerves fire nonstop. And the famous death curl? It isn't pain. Spiders push their legs out with fluid pressure, like hydraulic pistons, and when that pressure drops all eight legs snap inward. If the dose was too low, the spider's enzymes break the poison down, the pressure comes back, and the "dead" spider walks off. 0:00 You sprayed a spider 0:24 What bug spray is built for 0:39 Why a fly dies in seconds 0:59 Spiders breathe differently 1:18 The book lung shield 1:29 Through the skin to the nerves 1:51 Nerves firing nonstop 2:06 The death curl 2:16 Spider hydraulics 2:33 Why the legs snap inward 2:49 Still alive 3:08 The comeback 3:27 What really happens #spider #animalfacts #science