The whole set spider-spiderweb is studied as a dynamic system in order to obtain the reaction of the system when subjected to conditions of resonance. A Spiderweb is a structure with a unique combination of strength, rigidity and tenacity, optimal to transform kinetic energy into deformation energy and capture prey. However, there are external environmental conditions that may lead this structure to resonance conditions that could damage it. It was experimentally shown that when this happens, the spider is able to modify the spiderweb silk tension, stiffening the structure to put the system away from resonance conditions. The spider senses, by its legs, the vibration in the spider web and acts when the amplitude increase significantly and remain for a long period, thus changing the system tension. A dynamic conceptual model whit one degree of freedom is an effective tool to represent the dynamic behavior of the set spider-spiderweb under resonance conditions.