GPS and satellite tracking collars have transformed wildlife research, but their welfare effects on tracked animals — including physical burden, behaviour alteration, and collar-related injuries — require careful consideration and ongoing improvement.
GPS collar welfare illustrates the complex trade-off between scientific knowledge gained and welfare cost to individual tracked animals. The data produced by tracking studies has been fundamental to understanding wildlife movement, habitat requirements, and population dynamics — knowledge that underpins effective conservation planning for many species. Yet the welfare costs are real: capture for collar fitting causes acute stress, devices add physical burden, and collar malfunction or poor fit can cause chronic injury. The welfare-conscious approach requires genuine justification for each tracking study, device specification appropriate to the species, collar fitting by experienced researchers, post-deployment monitoring for signs of device-related welfare compromise, and rapid removal when problems are detected. The principle of minimising the number of individuals collared and the duration of device attachment, while maximising scientific return per animal, applies the 3Rs framework to field research.