A brown widow spider can react quickly to stimuli, typically within a few seconds. When threatened or disturbed, it may flee or exhibit defensive behaviors such as curling its legs or playing dead. However, the exact reaction time can vary depending on environmental factors and the specific situation.
instantly
it should react immediately after snapping it.
fast
52442
2 minutes!
Less than 2 hours.
2 days
Ten days
It doesn't take any time: instantaneous!
About 4 weeks
People didn't want to believe it.
Dr. Jerry Balentine's quote: "The black widow is about a half-inch long and symptoms of bite include abdominal pain, ... The bites of very large spiders such as tarantulas can be painful." I think it would take a long time.