Dynamics of domain walls (DWs) in pulsed magnetic fields as strong as 5.5 kOe at different temperatures in orthoferrites EuFeO 3 (4.2-300 K), TmFeO 3 (100-300 K), LuFeO 3 (300 K), YFeO 3 (460 K), and DyFeO 3 (77-300 K) has been investigated. The domain wall velocity as a function of magnetic field ( V( H)) is nonlinear in all the orthoferrites studied, consisting of discrete intervals (∆ Hi) within which the DW moves at a constant rate. The formation of ∆ Hi is due to a generation by the DW elastic and bend vibrations in a strongly dissipative and nonlinear medium. The DW motion reveals periodic superstructures at supersonic speeds. At the moment when the DW is overcoming the sound barrier, the nonsteady restructuring of domain structures, accompanied by changes in the fine structure of the DW, has been found.