1. Density and extra-pair fertilizations in birds: a comparative analysis

   • David F. Westneat
   • Paul W. Sherman

   REVIEW Pages: 205 - 215

2. Estimating paternity with spatial behaviour and DNA fingerprinting in the striped plateau lizard, Sceloporus virgatus (Phrynosomatidae)

   • Allison J. Abell

   ORIGINAL ARTICLES Pages: 217 - 226

3. Testis size variation in frogs: testing the alternatives

   • Sharon B. Emerson

   Article Pages: 227 - 235

4. Weapon size versus body size as a predictor of winning in fights between shore crabs, Carcinus maenas (L.)

   • Lynne U. Sneddon
   • Felicity A. Huntingford
   • Alan C. Taylor

   Article Pages: 237 - 242

5. Variations in the birth sex ratio and neonatal mortality in a natural herd of horses

   • Anne-Marie Monard
   • Patrick Duncan
   • Claudia Feh

   Article Pages: 243 - 249

6. Deception by helpers in cooperatively breeding white-winged choughs and its experimental manipulation

   • Christopher R. J. Boland
   • Robert Heinsohn
   • Andrew Cockburn

   Article Pages: 251 - 256

7. Correlated evolution of prey chemical discrimination with foraging, lingual morphology and vomeronasal chemoreceptor abundance in lizards

   • William E. Cooper

   Article Pages: 257 - 265

8. Experimental tests of the information-center hypothesis with black vultures (Coragypsatratus) and turkey vultures (Cathartesaura)

   • Neil J. Buckley

   Article Pages: 267 - 279

9. Delayed plumage maturation in Lazuli buntings: tests of the female mimicry and status signalling hypotheses

   • Vincent R. Muehter
   • Erick Greene
   • Laurene Ratcliffe

   Article Pages: 281 - 290