1. Editorial

   • K. E. Linsenmair

   EditorialNotes Pages: 1 - 2

2. Episodic targeting aggression and the histories of Lemur social groups

   • Laura G. Vick
   • M. E. Pereira

   OriginalPaper Pages: 3 - 12

3. Calling energetics of a neotropical treefrog, Hyla microcephala

   • Kentwood D. Wells
   • Theodore L. Taigen

   OriginalPaper Pages: 13 - 22

4. Male traits expressed in females: direct or indirect sexual selection?

   • Katherine E. Muma
   • Patrick J. Weatherhead

   OriginalPaper Pages: 23 - 31

5. Intraspecific nest parasitism in the swallow Hirundo rustica: the importance of neighbors

   • Anders Pape Møller

   OriginalPaper Pages: 33 - 38

6. Results of dyeing male yellow-headed blackbirds solid black: implications for the arbitrary identity badge hypothesis

   • Sievert Rohwer
   • Eivin Røskaft

   OriginalPaper Pages: 39 - 48

7. Coloration in New World orioles

   • Nancy J. Flood

   OriginalPaper Pages: 49 - 56

8. Arousal by sexual stimuli accelerates the re-entrainment of hamsters to phase advanced light-dark cycles

   • Gerry I. Honrado
   • N. Mrosovsky

   OriginalPaper Pages: 57 - 63

9. A mechanism for female choice of large males in the treefrog Hyla chrysoscelis

   • Molly R. Morris
   • S. L. Yoon

   OriginalPaper Pages: 65 - 71

10. An experimental study of paternal behavior in red-winged blackbirds

    • Linda A. Whittingham

    OriginalPaper Pages: 73 - 80