Wild songbirds face numerous human-caused threats including window collisions, outdoor cats, pesticides, and habitat loss that cause suffering across billions of individual birds annually.
Individual songbird welfare is affected by numerous human-caused mortality sources that cause acute suffering before death. Window collision victims experience concussive injury that is often fatal but may involve prolonged dying with pain and disorientation. Cat predation causes both injury death and the terror of pursuit and capture. Pesticide poisoning at sub-lethal doses impairs neurological function, causing disorientation and inability to feed effectively. Population declines represent the elimination of billions of individuals who would otherwise live and experience normal wild lives. The scale of human-caused songbird mortality - estimated at over a billion birds annually in North America alone - represents a welfare catastrophe that is largely preventable through behavioral and policy changes.