The Cape honeybee phenomenon: the sympatric evolution of a social parasite in real time? P. Neumann R. Moritz Review Pages: 271 - 281
Incubation start and egg size in relation to body reserves in the common eider Sveinn HanssenHalvor EngebretsenKjell Erikstad Original Article Pages: 282 - 288
Determinants of paternity in the garden snail Helix aspersa David W. RogersRonald Chase Original Article Pages: 289 - 295
Effects of size and nuptial gifts on butterfly reproduction: can females compensate for a smaller size through male-derived nutrients? Jonas BergströmChrister Wiklund Original Article Pages: 296 - 302
Space use in lions, Panthera leo, in the Selous Game Reserve: social and ecological factors Goran Spong Original Article Pages: 303 - 307
Adaptive variation of airspeed in relation to wind, altitude and climb rate by migrating birds in the Arctic Anders HedenströmThomas AlerstamGudmundur A. Gudmundsson Original Article Pages: 308 - 317
Evidence for genetic variation in worker task performance by African and European honey bees Jennifer H. FewellSusan M. Bertram Original Article Pages: 318 - 325
Faithful fish: territory and mate defence favour monogamy in an African cichlid fish Josephine I. MorleySigal Balshine Original Article Pages: 326 - 331
Interspecific competition between native Eurasian red squirrels and alien grey squirrels: does resource partitioning occur? Luc A. WautersJohn GurnellGuido Tosi Original Article Pages: 332 - 341
Symmetry, male dominance and female mate preferences in the Iberian rock lizard, Lacerta monticola Pilar LópezAlberto MuñozJosé Martín Original Article Pages: 342 - 347
Low aggression levels and unbiased sex ratios in a prey-rich environment: no evidence of siblicide in Ngorongoro spotted hyenas (Crocuta crocuta) Bettina WachterOliver P. HönerHeribert Hofer Original Article Pages: 348 - 356