Trapping of wild birds for ringing, research, and illegal trade causes welfare concerns that vary with trap type, handling duration, and operator skill.
Bird trapping for legitimate research purposes with skilled operators and rapid processing minimizes welfare impacts while generating important conservation data. Poorly managed mist nets cause entanglement injuries, stress, and death. Illegal trapping for trade uses glue traps, lime sticks, and other methods causing prolonged suffering and high mortality. Distinguishing between licensed scientific trapping and illegal trade is important for welfare assessment.