The study uses a one-proton radical-pair model with specific hyperfine coupling and anisotropy parameters to simulate the behavior of flavin-tryptophan radical pairs in a magnetic field. The stochastic Liouville equation is solved to determine the triplet yield in a static magnetic field, and the change in triplet yield due to an additional oscillating magnetic field is calculated. The results show that the intensity of the oscillating field required to cause a change in triplet yield equivalent to that caused by the static field is much less than the intensities used in the experiments. The study also discusses the magnetic compass orientation in European robins and the potential mechanisms involved, including the role of magnetic fields in their navigation.The study uses a one-proton radical-pair model with specific hyperfine coupling and anisotropy parameters to simulate the behavior of flavin-tryptophan radical pairs in a magnetic field. The stochastic Liouville equation is solved to determine the triplet yield in a static magnetic field, and the change in triplet yield due to an additional oscillating magnetic field is calculated. The results show that the intensity of the oscillating field required to cause a change in triplet yield equivalent to that caused by the static field is much less than the intensities used in the experiments. The study also discusses the magnetic compass orientation in European robins and the potential mechanisms involved, including the role of magnetic fields in their navigation.