1. The use of perceptual features in categorization by orangutans (Pongo abelli)

   • Heidi L. Marsh
   • Suzanne E. MacDonald

   Original Paper 16 April 2008 Pages: 569 - 585

   

2. Inferential reasoning by exclusion in pigeons, dogs, and humans

   • Ulrike Aust
   • Friederike Range
   • Ludwig Huber

   Original Paper 29 February 2008 Pages: 587 - 597

   

3. Learning from others’ mistakes in capuchin monkeys (Cebus apella)

   • Hika Kuroshima
   • Hiroko Kuwahata
   • Kazuo Fujita

   Original Paper 05 March 2008 Pages: 599 - 609

   

4. Do chimpanzees learn reputation by observation? Evidence from direct and indirect experience with generous and selfish strangers

   • Francys Subiaul
   • Jennifer Vonk
   • Jochen Barth

   Original Paper 21 March 2008 Pages: 611 - 623

   

5. Flexibility of cue use in the fox squirrel (Sciurus niger)

   • Anna S. Waisman
   • Lucia F. Jacobs

   Original Paper 19 March 2008 Pages: 625 - 636

   

6. Are ants sensitive to the geometry of tunnel bifurcation?

   • Grégory Gerbier
   • Simon Garnier
   • Vincent Fourcassié

   Original Paper 06 May 2008 Pages: 637 - 642

   

7. Smells like sib spirit: kin recognition in three-spined sticklebacks (Gasterosteus aculeatus) is mediated by olfactory cues

   • Marion Mehlis
   • Theo C. M. Bakker
   • Joachim G. Frommen

   Original Paper 09 May 2008 Pages: 643 - 650

   

8. Sign- and goal-tracking in Atlantic cod (Gadus morhua)

   • Jonatan Nilsson
   • Tore S. Kristiansen
   • Ruud van den Bos

   Original Paper 14 May 2008 Pages: 651 - 659

   

9. Chimpanzee (Pan troglodytes) and orangutan (Pongo abelii) forethought: self-control and pre-experience in the face of future tool use

   • Mathias Osvath
   • Helena Osvath

   Original Paper 14 June 2008 Pages: 661 - 674

   

10. Multimodal communication and spatial binding in pied currawongs (Strepera graculina)

    • Sarah R. Lombardo
    • Erica Mackey
    • Daniel T. Blumstein

    Original Paper 27 May 2008 Pages: 675 - 682

    

11. Evidence for counting in insects

    • Marie Dacke
    • Mandyam V. Srinivasan

    Original Paper 27 May 2008 Pages: 683 - 689

    

12. Short-term observational spatial memory in Jackdaws (Corvus monedula) and Ravens (Corvus corax)

    • Christelle Scheid
    • Thomas Bugnyar

    Original Paper 27 May 2008 Pages: 691 - 698

    

13. Discrimination of moving video images of self by pigeons (Columba livia)

    • Koji Toda
    • Shigeru Watanabe

    Original Paper 03 June 2008 Pages: 699 - 705

    

14. Preference for oddity: uniqueness heuristic or hierarchical choice process?

    • Thomas A. Waite

    Original Paper 05 June 2008 Pages: 707 - 713

    

15. Harbour seals (Phoca vitulina) can steer by the stars

    • Björn Mauck
    • Nele Gläser
    • Guido Dehnhardt

    Short Communication 09 May 2008 Pages: 715 - 718

    

16. Learning generalization in problem solving by a blue-fronted parrot (Amazona aestiva)

    • Olívia de Mendonça-Furtado
    • Eduardo B. Ottoni

    Short Communication 25 June 2008 Pages: 719 - 725

    

17. Ultra-rapid categorisation in non-human primates

    • P. Girard
    • C. Jouffrais
    • C. H. Kirchner

    Erratum 18 June 2008 Pages: 727 - 727