Pesticide exposure harms bumblebees in multiple ways beyond lethality, including disrupting navigation, learning, and reproductive success.
Whether bees have subjective experience remains uncertain, but their complex neural architecture supports sophisticated behaviour and learning. Pesticide-impaired bees may be disoriented and unable to find their way back to the nest, resulting in exposure and starvation. Colony collapse from queen impairment leaves workers without purpose. The precautionary principle suggests applying welfare protections where evidence of harm exists.