1. Chimpanzees (Pan troglodytes) and bonobos (Pan paniscus) quantify split solid objects

   • Trix Cacchione
   • Christine Hrubesch
   • Josep Call

   Original Paper 09 August 2012 Pages: 1 - 10

   

2. Experimental evidence for action imitation in killer whales (Orcinus orca)

   • José Z. Abramson
   • Victoria Hernández-Lloreda
   • Fernando Colmenares

   Original Paper 09 August 2012 Pages: 11 - 22

   

3. Spatial behavior in male and female crayfish (Orconectes rusticus): learning strategies and memory duration

   • Ann Jane Tierney
   • Kate Andrews

   Original Paper 14 August 2012 Pages: 23 - 34

   

4. Ravens (Corvus corax) are indifferent to the gains of conspecific recipients or human partners in experimental tasks

   • Felice Di Lascio
   • François Nyffeler
   • Thomas Bugnyar

   Original Paper 14 August 2012 Pages: 35 - 43

   

5. The relevance of temporal cues in a fish sound: a first experimental investigation using modified signals in cichlids

   • Frédéric Bertucci
   • Jöel Attia
   • Nicolas Mathevon

   Original Paper 22 August 2012 Pages: 45 - 54

   

6. Social learning in juvenile lemon sharks, Negaprion brevirostris

   • Tristan L. Guttridge
   • Sander van Dijk
   • Culum Brown

   Original Paper 30 August 2012 Pages: 55 - 64

   

7. Gorillas’ use of the escape response in object choice memory tests

   • Chikako Suda-King
   • Amanda E. Bania
   • Francys Subiaul

   Original Paper 25 August 2012 Pages: 65 - 84

   

8. Conditioned water affects pair formation behaviour in the marine polychaete Neanthes (Nereis) acuminata

   • Ellen J. Storey
   • Don J. Reish
   • Jörg D. Hardege

   Original Paper 01 September 2012 Pages: 85 - 89

   

9. Long-term memory of hierarchical relationships in free-living greylag geese

   • Brigitte M. Weiß
   • Isabella B. R. Scheiber

   Original Paper 06 September 2012 Pages: 91 - 97

   

10. Picture–object recognition in the tortoise Chelonoidis carbonaria

    • Anna Wilkinson
    • Julia Mueller-Paul
    • Ludwig Huber

    Original Paper 04 September 2012 Pages: 99 - 107

    

11. Bantams (Gallus gallus domesticus) also perceive a reversed Zöllner illusion

    • Sota Watanabe
    • Noriyuki Nakamura
    • Kazuo Fujita

    Original Paper 09 September 2012 Pages: 109 - 115

    

12. Same/different discrimination by bumblebee colonies

    • Michael F. Brown
    • Justin M. Sayde

    Original Paper 04 September 2012 Pages: 117 - 125

    

13. Strength of hand preference and dual task performance by common marmosets

    • T. Piddington
    • L. J. Rogers

    Original Paper 29 September 2012 Pages: 127 - 135

    

14. Can domestic dogs (Canis familiaris) use referential emotional expressions to locate hidden food?

    • David Buttelmann
    • Michael Tomasello

    Short Communication 09 September 2012 Pages: 137 - 145

    

15. Different chemical cues originating from a shared predator induce common defense responses in two prey species

    • Teruhiko Takahara
    • Hideyuki Doi
    • Ryohei Yamaoka

    Short Communication 14 October 2012 Pages: 147 - 153