Despite the fact that carnivorous plants fascinated people even back in the time of Darwin, the Venus flytrap is the only one that was thoroughly researched and is still being researched. Its transformed leaf captures prey by changing the curvature of its two lobes after several mechanical stimuli. The mechanical stimulus is manifested as the action potential in the leaf, after which it changes turgor, stimulates digestive enzyme secretion and so on, which is physiologically similar to animal organisms with the difference that instead of a dedicated nervous system the plant uses an already existing vascular system for long distances and plasmodesmata for short. The waterwheel plant, one of Venus fly trap's phylogenetic sisters, uses a similar mechanism that is adapted for hunting smaller prey in water. Carnivorous plants are found in various families with different traps used to hunt prey from which they improve their low-nitrogen mineral nutrition from the soil using enzymatic degradation and nutrient absorption. The common sundew has sticky tentacles that curl on contact, Drosophyllum lusitanicum uses passive adhesive traps, pitcher plants have pitcher-like traps that catch prey. It is recorded that most attract insects with smells or colors/appearance.