Wildlife researchers capture, mark, and sample wild animals to study populations and behaviour, with welfare costs that must be minimised through careful protocol design and ethics review.
Wildlife field research requires a careful balancing of scientific benefit against welfare cost. Capture by net, trap, or chemical immobilisation causes acute stress responses in wild animals, and complications from anaesthesia — including death — do occur. Marking devices including collars and tags can cause physical injury, restrict movement, and alter predator-prey dynamics if they affect escape behaviour. Researchers using minimally invasive methods, applying the 3Rs, and conducting rigorous ethics review contribute to a research culture where animal welfare is taken seriously as a constraint, not an afterthought. The growing availability of non-invasive remote sensing techniques provides welfare-improving alternatives for some research questions.