1. The hearing of an avian predator and its avian prey

   • G. M. Klump
   • E. Kretzschmar
   • E. Curio

   OriginalPaper 01 April 1986 Pages: 317 - 323

2. Different ejaculate delivery strategies in first versus subsequent matings in the swallowtail butterfly Papilio machaon L.

   • Lena Svärd
   • Christer Wiklund

   OriginalPaper 01 April 1986 Pages: 325 - 330

3. Prolonged mating in the milkweed leaf beetle Labidomera clivicollis clivicollis (Coleoptera: Chrysomelidae): a test of the “sperm-loading” hypothesis

   • Janis L. Dickinson

   OriginalPaper 01 April 1986 Pages: 331 - 338

4. Helping at the nest, allofeeding and social status in immature arabian babblers

   • Tamsie R. Carlisle
   • Amotz Zahavi

   OriginalPaper 01 April 1986 Pages: 339 - 351

5. Early maternal investment in male and female African elephant calves

   • Phyllis C. Lee
   • Cynthia J. Moss

   OriginalPaper 01 April 1986 Pages: 353 - 361

6. The biology of a subtropical population of Halictus ligatus Say (Hymenoptera: Halictidae)

   • Laurence Packer
   • Gerd Knerer

   OriginalPaper 01 April 1986 Pages: 363 - 375

7. Biparental defence in a spider mite (Acari: Tetranychidae) infesting Sasa bamboo

   • Yutaka Saitō

   OriginalPaper 01 April 1986 Pages: 377 - 386

8. Aposematism in a soft-bodied insect: a case for kin selection

   • Stephen B. Malcolm

   OriginalPaper 01 April 1986 Pages: 387 - 393