Many studies have also shown that moths navigate. One study showed that many moths may use the Earth's magnetic field to navigate, as a study of the moth heart and dart suggests. Another study, of the migratory behavior of the silver Y, showed, even at high altitudes, the species can correct its course with changing winds, and prefers flying with favourable winds, suggesting a great sense of direction. "Aphrissa statira" in Panama loses its navigational capacity when exposed to a magnetic field, suggesting it uses the Earth's magnetic field.