When females should contest for food – testing hypotheses about resource density, distribution, size, and quality with Hanuman langurs (Presbytis entellus) Andreas KoenigJan BeiseJörg U. Ganzhorn ORIGINAL ARTICLES Pages: 225 - 237
Multiple mating increases the sperm stores of Atta colombica leafcutter ant queens Else J. FjerdingstadJacobus J. Boomsma Article Pages: 257 - 261
Chemically mediated avoidance of a predatory odonate (Anaxjunius) by American toad (Bufoamericanus) and wood frog (Ranasylvatica) tadpoles James PetrankaLaura Hayes Article Pages: 263 - 271
Costs of brood parasitism and the lack of defenses on the yellow-winged blackbird - shiny cowbird system Viviana MassoniJuan Carlos Reboreda Article Pages: 273 - 280
Cluttered habitats reduce wing asymmetry and increase flight performance in European starlings John P. SwaddleMark S. Witter Article Pages: 281 - 287
The role of daytime cues in the development of magnetic orientation in a night-migrating bird Peter WeindlerFrank BöhmeWolfgang Wiltschko Article Pages: 289 - 294