Reintroducing keystone species creates trophic cascades that benefit entire ecosystems. The welfare of reintroduced animals and those affected by their return requires integrated consideration.
Keystone species rewilding creates complex welfare calculations. The individual animals reintroduced face welfare challenges of adaptation to a new environment. The prey species affected by their return experience increased predation pressure — a welfare cost for individuals even as the ecosystem benefits overall. The ecological and welfare benefits ripple outward: recovering ecosystems support higher biodiversity and more abundant wildlife populations. Integrating individual animal welfare assessment into rewilding planning — alongside population and ecosystem metrics — represents best practice in evidence-based conservation.