The mass decline of insects affects trillions of individual animals simultaneously, with welfare implications of extraordinary scale alongside ecological consequences.
The welfare implications of insect population collapse are scale-dependent on assumptions about insect sentience. If insects experience something even rudimentary, then the death of trillions from pesticide exposure represents welfare harm of extraordinary magnitude. Independently of sentience questions, insect community collapse eliminates the food base for billions of insectivorous vertebrates that unambiguously suffer from starvation. Addressing insect decline therefore has welfare implications across multiple levels of the food web.