1. Editorial

   • Hubert Markl
   • K. Eduard Linsenmair

   EditorialNotes Pages: 1 - 1

2. Orientation of homing pigeons at magnetic anomalies

   • A. J. Lednor
   • C. Walcott

   OriginalPaper Pages: 3 - 8

3. Antipredation role of clumped nesting by marsh-nesting red-winged blackbirds

   • J. Picman
   • M. Leonard
   • A. Horn

   OriginalPaper Pages: 9 - 15

4. Genotypic variability in age polyethism and task specialization in the honey bee, Apis mellifera (Hymenoptera: Apidae)

   • Nicholas W. Calderone
   • Robert E. Page Jr.

   OriginalPaper Pages: 17 - 25

5. Female pied flycatchers Ficedula hypoleuca choose male characteristics in homogeneous habitats

   • Jan T. Lifjeld
   • Tore Slagsvold

   OriginalPaper Pages: 27 - 36

6. Patch use as an indicator of habitat preference, predation risk, and competition

   • Joel S. Brown

   OriginalPaper Pages: 37 - 47

7. Copulatory tactics in relation to sperm competition in Rocky Mountain bighorn sheep

   • John T. Hogg

   OriginalPaper Pages: 49 - 59

8. Population differences in how black-tailed prairie dogs deal with snakes

   • W. J. Loughry

   OriginalPaper Pages: 61 - 67

9. Social organization and space-use in Gunnison's prairie dog

   • Linda S. Rayor

   OriginalPaper Pages: 69 - 78