Gwinner, Eberhard Emeritus, Seewiesen, Max Planck Institut für Ornithologie, Max Planck Society; Verhaltensphysiologie, Seewiesen, Max Planck Institut für Ornithologie, Max Planck Society;
Gwinner, E. (1985). Effects of photoperiod during winter on the circannual rhythms of Zugunruhe, molt, body weight and reproductive parameters in two closely related species of flycatchers, Ficedula albicollis and F. hypoleuca, wintering at different latitudes.