Honeybee colony collapse disorder and related declines affect both wild and managed bee populations. Understanding threats to bee welfare has implications for ecosystems and agriculture worldwide.
Honeybees and other bees likely experience states that influence their behavior in ways analogous to positive and negative affect, and there is growing evidence for primitive emotional states in bees. Varroa mite infestation causes physical harm — mites feed on bee body fat and transmit viruses that cause wing deformities and immune suppression, directly affecting individual bee welfare. Pesticide exposure at sublethal doses impairs the navigation, memory, and communication abilities that bees depend on for survival — a cognitive welfare harm. Nutritional stress from monoculture landscapes affects both colony health and individual bee wellbeing. While the scale of invertebrate welfare is philosophically complex, the declining health of bee populations has clear individual-level consequences.