Colony collapse disorder and other causes of mass honeybee die-offs represent welfare events affecting millions of individual animals, and their causes — pesticides, pathogens, and habitat loss — are now well understood and actionable.
Individual bee welfare is contested because of uncertainty about insect sentience, but the scientific evidence increasingly supports that bees experience pain-like states, show pessimistic cognitive bias under stress, and have complex emotional responses to environmental threats. At a colony level, the welfare impact of CCD and mass die-offs is clear — millions of individual animals die in shortened, compromised lives. The causes of bee decline are known and actionable, making advocacy for pesticide reform and habitat restoration a meaningful welfare intervention regardless of the precise degree of bee sentience.