Research overview: satellite-tag drag and energetic-cost concerns

Any device added to an animal carries potential costs, and this overview examines research into the energetic and biomechanical burden of tags, drawing on the broader literature where careful experiments have measured drag and added mass effects. For terrestrial cats the dominant concerns are collar weight relative to body mass, possible interference with movement through dense cover, and capture-related stress, rather than the fluid drag that dominates studies of swimming and flying animals. The overview frames the precautionary principle guiding deployment, keeping devices as small as possible and below accepted weight thresholds, and the ethical scrutiny that endangered-species work demands. Quantifying tag effects protects both the welfare of study animals and the validity of the movement data they provide.