1. Nestmate discrimination in social wasps (Polistes metricus, Hymenoptera: Vespidae)

   • Nancy M. Ross
   • George J. Gamboa

   OriginalPaper Pages: 163 - 165

2. Cooperative behavior and social organization of the Swallow-tailed Manakin (Chiroxiphia caudata)

   • Mercedes S. Foster

   OriginalPaper Pages: 167 - 177

3. Individual differences and within-flock convergence in chickadee calls

   • Dorothy L. Mammen
   • Stephen Nowicki

   OriginalPaper Pages: 179 - 186

4. Mate guarding and gallivanting by male hoary marmots (Marmota caligata)

   • David P. Barash

   OriginalPaper Pages: 187 - 193

5. Temporal patterns of foraging activity in some wood warblers in relation to the availability of insect prey

   • Richard L. Hutto

   OriginalPaper Pages: 195 - 198

6. Food information in the Black-headed Gull, Larus ridibundus

   • Malte Andersson
   • Frank Götmark
   • Christer G. Wiklund

   OriginalPaper Pages: 199 - 202

7. Imperfectly optimal animals

   • Anthony C. Janetos
   • Blaine J. Cole

   OriginalPaper Pages: 203 - 209

8. An experimental investigation of the bioacoustics of cowbird song

   • Andrew P. King
   • Meredith J. West
   • J. E. R. Staddon

   OriginalPaper Pages: 211 - 217

9. The effect of mating on female sexual behavior of Teleogryllus commodus Walker

   • Werner Loher

   OriginalPaper Pages: 219 - 225

10. Precopulatory sexual interaction in an arctiid moth (Utetheisa ornatrix): Role of a pheromone derived from dietary alkaloids

    • William E. Conner
    • Thomas Eisner
    • Jerrold Meinwald

    OriginalPaper Pages: 227 - 235