Migratory Restlessness in an Equatorial Nonmigratory Bird

• Barbara Helm ,

  *To whom correspondence should be addressed. E-mail: helm@orn.mpg.de

  Affiliation Max Planck Institute for Ornithology, Andechs, Germany

  ⨯
• Eberhard Gwinner †

  † Deceased.

  Affiliation Max Planck Institute for Ornithology, Andechs, Germany

  ⨯