Mostly carnivorous plants grow in places with soil that doesn't offer much nutrient value. We can easily consume   a vitamin pill for our nutrients supply, But these amazing plants have had to evolve over thousands of years, developing insect traps to get their nutritional needs met. Just look at all they've done in the fight to survive."
Bladderworts are an example of such type of plant. They appear so small and delicate growing in a quiet pond. But these are the fastest-known killers of the plant kingdom, able to suck in gullible mosquito larvae in 1/50 of a second using a trap door, Isn't it amazing!