Migration timing and wintering areas of three species of Flycatchers (tyrannus) breeding in the great plains of North America

por Jahn, A.E., Cueto, V.R., Fox, J.W., Husak, M.S., Kim, D.H., Landoll, D.V., Ledezma, J.P., LePage, H.K., Levey, D.J., Murphy, M.T., Renfrew, R.B.