title: Evolutionary aspects of orientation and migration in birds.
abstract: Evolutionary aspects of avian orientation and navigation are overviewed. A theoretical approach to the evolution of complex (endogenously programmed) migratory behavior is presented, using the comparative method of ordering a progression in existing behavioral characteristics from dispersal, to facultative migration, to obligate migration.
authors.affiliation: Max-Planck-Institut für Verhaltensphysiologie, Vogelwarte Radolfzell, Schloss Moeggingen, Germany.
authors.forename: S B
authors.initials: SB
authors.lastname: Terrill
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D005075:Biological Evolution; D001717:Birds / Q000502:physiology*; D004574:Electromagnetic Fields; D008027:Light; D008568:Memory; D009949:Orientation; D013028:Space Perception; D013472:Sunlight; D014785:Vision, Ocular; D014919:Wind