The management of invasive species for conservation outcomes creates recurring welfare dilemmas as lethal control is often the most effective tool for protecting native biodiversity.
Invasive species control involves killing large numbers of sentient animals to protect other sentient animals and ecosystem integrity. Both interests are morally significant. The welfare case for improving the humanity of lethal control methods is strong — particularly developing faster-acting baits, reducing trap suffering and improving pre-slaughter conditions. The welfare interests of invasive species do not outweigh conservation necessity but must be incorporated into method selection and program design.