1. From the Editor

   • Keisuke Ueda

   Editorial 15 December 2004 Pages: 1 - 1

2. Play behaviour and active training of Montagu’s harrier (Circus pygargus) offspring in the post-fledging period

   • Ignacy Kitowski

   Article 17 June 2004 Pages: 3 - 8

3. The sexual function of wallowing in male wild boar (Sus scrofa)

   • Pedro Fernández-Llario

   Article 06 August 2004 Pages: 9 - 14

   

4. Self seeks like: many humans choose their dog pets following rules used for assortative mating

   • Christina Payne
   • Klaus Jaffe

   Article 04 August 2004 Pages: 15 - 18

   

5. Grazing behaviour of free-ranging donkeys and Shetland ponies in different reproductive states

   • Indra Lamoot
   • Charlotte Vandenberghe
   • Maurice Hoffmann

   Article 10 September 2004 Pages: 19 - 27

   

6. Predator avoidance as a function of flocking in the sexually dichromatic Hawaii akepa

   • Patrick J. Hart
   • Leonard A. Freed

   Article 19 August 2004 Pages: 29 - 33

   

7. Last-male paternity of Euborellia plebeja, an earwig with elongated genitalia and sperm-removal behavior

   • Yoshitaka Kamimura

   Article 16 September 2004 Pages: 35 - 41

   

8. Effect of wasp size, physiological state, and prior host experience on host-searching behavior in a parasitoid wasp (Hymenoptera: Ichneumonidae)

   • Kanako Ueno
   • Takatoshi Ueno

   Article 11 November 2004 Pages: 43 - 49

   

9. Copulation patterns in the golden orb-web spider Nephila madagascariensis

   • Jutta M. Schneider
   • Lutz Fromhage
   • Gabriele Uhl

   Article 22 October 2004 Pages: 51 - 55

   

10. Taxonomic diversity within the Japanese green lacewing, Chrysoperla carnea (Neuroptera: Chrysopidae), identified by courtship song analyses and crossing tests

    • Hisatomo Taki
    • Shinsuke Kuroki
    • Masashi Nomura

    Article 12 November 2004 Pages: 57 - 61

    

11. Parental care of kestrels living in stable and varying environmental conditions

    • Giorgia Gaibani
    • Davide Csermely
    • Erkki Korpimäki

    Article 22 October 2004 Pages: 63 - 67

12. Size-assortative mating in the earthworm Eisenia fetida (Oligochaeta, Lumbricidae)

    • Fernando Monroy
    • Manuel Aira
    • Jorge Domínguez

    Short Communication 06 October 2004 Pages: 69 - 70

    

13. Flexibility in the multi-modal courtship of a wolf spider, Schizocosa ocreata

    • Phillip W. Taylor
    • J. Andrew Roberts
    • George W. Uetz

    Short Communication 06 October 2004 Pages: 71 - 75