Invasive species control programs kill billions of animals annually. Integrating welfare considerations into control programs can reduce suffering while maintaining ecological effectiveness.
Invasive species management presents a genuine welfare dilemma: the suffering caused by control programs must be weighed against the suffering caused to native prey species by invasive predators. A stoat in New Zealand kills kiwi chicks through prolonged predation that causes fear and pain; the stoat killed in a trap also experiences suffering if the trap is not immediately lethal. Welfare-informed invasive species management seeks to achieve conservation objectives while minimizing the suffering involved in control, rather than treating animal welfare as irrelevant when conservation goals justify lethal action. The development of more humane traps, faster-acting toxicants, and non-lethal alternatives reflects a growing recognition that welfare and conservation goals can be pursued simultaneously.