Some of the early work was based on the absurd.
Reflecting on some of our social structures where the convergence of at first glance perfectly sound ideas, force us to accept or participate in absurd activities.
The drum is about the automatization of human activities: the drum being a musical instrument that is designed to appeal our sense of rhythm and transcend our emotional states. By automatizing it, it obviously loses its main purpose of being, and falls into the absurd.
The Bird nest is as absurd, showing our constant desire to control the environment, and doing so causing more damage than good.
The world has been surviving for billions of years without our intervention, and surely it will continue long after we will be gone. It is not nature that needs to be fixed, it is our behavior as a species if we intend to survive for the long term.