Advances in wild animal welfare science are developing validated methods to assess suffering and positive welfare in free-living animals across diverse ecological contexts.
Wild animal welfare science addresses the historically neglected dimension of conservation biology: not just whether populations persist, but whether individual wild animals have good lives. The methodological innovations — non-invasive cortisol measurement, cognitive bias testing, remote sensing welfare indicators — are transforming the ability to assess welfare without causing the handling-related welfare harm that limited earlier approaches. This expanding toolkit enables welfare science to operate at the scale and remoteness that wild animal lives require. The recognition that climate change, habitat fragmentation, and predator-prey dynamics all have welfare dimensions visible in individual animal experience is expanding the research agenda beyond the population-level focus of traditional conservation.