The diagram illustrates how Venus Flytraps, depending on their sizes, capture and digest small preys.
Both small and large traps follow a similar mechanism when a prey touches its hairs. This action causes the trap to snap shut, releasing digestive enzymes to break down the prey. For smaller traps, this process occurs with every insect, allowing them to absorb essential nutrients for survival.
However, a relevant distinct process is recorded for traps more significant in size. Once the hairs receive the prey signals, the trap closes and assesses the nutritional value of the insect. If the insect is considered to provide little efficiency to the digestive effort, the trap will bring no harm to the preys, release them and save their energy and enzymes for bigger and worthy victims.
In summary, while both mechanisms are similar in the trapping techniques, the larger size tends to be more selective. They behave favorably at rich-nutrition prey that brings beneficial impacts to them, while the smaller traps will utilize their digestive enzymes to any available insects.