1. Are naked and common mole-rats eusocial and if so, why?

   • H. Burda
   • Rodney L. Honeycutt
   • Andreas Scharff

   Review Pages: 293 - 303

2. Is asynchronous hatching adaptive in herring gulls (Larus argentatus)?

   • Lars Hillström
   • Mikael Kilpi
   • Kai Lindström

   Original Article Pages: 304 - 311

3. Brood sex ratios, female harem status and resources for nestling provisioning in the great reed warbler (Acrocephalus arundinaceus)

   • H. Westerdahl
   • Staffan Bensch
   • Torbjörn von Schantz

   Original Article Pages: 312 - 318

4. Multiple song repertoire characteristics in the willow warbler (Phylloscopus trochilus): correlations with female choice and offspring viability

   • D. Gil
   • Peter J. B. Slater

   Original Article Pages: 319 - 326

5. Quantitative variation in ecological and hormonal variables correlates with spatial organization of pronghorn (Antilocapra americana) males

   • C. R. Maher

   Original Article Pages: 327 - 338

6. Weather-mediated natural selection on arrival time in cliff swallows (Petrochelidon pyrrhonota)

   • C. R. Brown
   • Mary Bomberger Brown

   Original Paper Pages: 339 - 345

7. The effect of queen-worker conflict on caste determination in the bumblebee Bombus terrestris

   • J. Cnaani
   • G. E. Robinson
   • A. Hefetz

   Original Article Pages: 346 - 352

8. Cleaner-client interactions on a Caribbean reef: influence of correlates of parasitism

   • C. Arnal
   • I. M. Côté
   • S. Morand

   Original Paper Pages: 353 - 358

9. Genetic evidence for mixed parentage in nests of the emu (Dromaius novaehollandiae)

   • Emma L. Taylor
   • Dominique Blache
   • Graeme B. Martin

   Original Article Pages: 359 - 364

10. Communal burrowing in the hystricognath rodent, Octodon degus: a benefit of sociality?

    • L. A. Ebensperger
    • Francisco Bozinovic

    Original Article Pages: 365 - 369