1. Ornaments and condition: plumage patch sizes, nutritional reserve state, reserve accumulation, and reserve depletion

   • Gergely Hegyi
   • Susanne Jenni-Eiermann
   • János Török

   Original Article Open access 01 June 2019 Article: 89

   

2. Transitivity and structural balance in marmot social networks

   • Tina W. Wey
   • Ferenc Jordán
   • Daniel T. Blumstein

   Original Article 29 May 2019 Article: 88

   

3. Lizard calls convey honest information on body size and bite performance: a role in predator deterrence?

   • Simon Baeckens
   • Diego Llusia
   • José Martín

   Original Article 29 May 2019 Article: 87

   

4. Learning prosociality: insights from young forager and subsistence farmer children’s food sharing with mothers and others

   • Gilda Morelli
   • Paula Ivey Henry
   • Bryn Spielvogel

   Review 28 May 2019 Article: 86

   

5. Parental sex allocation and sex-specific survival drive offspring sex ratio bias in little owls

   • Matthias Tschumi
   • Jolanda Humbel
   • Martin U. Grüebler

   Original Article 27 May 2019 Article: 85

   

6. Ant personalities and behavioral plasticity along a climatic gradient

   • Udi Segev
   • Susanne Foitzik

   Original Article 27 May 2019 Article: 84

   

7. The role of male coloration and ornamentation in potential alternative mating strategies of the dimorphic jumping spider, Maevia inclemens

   • Laurel B. Lietzenmayer
   • David L. Clark
   • Lisa A. Taylor

   Original Article Open access 27 May 2019 Article: 83

   

8. Elevation affects extra-pair paternity but not a sexually selected plumage trait in dark-eyed juncos

   • Katie LaBarbera
   • Kia R. R. Hayes
   • Eileen A. Lacey

   Original Article 26 May 2019 Article: 82

   

9. Crickets become behaviourally more stable when raised under higher temperatures

   • Petri T. Niemelä
   • Peter Philip Niehoff
   • Cristina Tuni

   Original Article 26 May 2019 Article: 81

   

10. A guide for ecologists to build a low-cost selective trap using radio frequency identification detection

    • Magali Meniri
    • Anthony Farley
    • Nicolas Fasel

    Methods Papers 25 May 2019 Article: 80

    

11. How robust are risk-taking associations in incubating birds? A test and a review

    • Kylee F. Graham
    • Dave Shutler

    Original Article 24 May 2019 Article: 79

    

12. How exploitation launched human cooperation

    • Rahul Bhui
    • Maciej Chudek
    • Joseph Henrich

    Original Article 23 May 2019 Article: 78

    

13. Current parasite resistance trades off with future defenses and flight performance

    • Collin J. Horn
    • Lien T. Luong

    Original Article 22 May 2019 Article: 77

    

14. Parental feeding responses to experimental short-term partner removal in a species with male and female brood desertion

    • Alejandro Cantarero
    • Mireia Plaza
    • M. Griggio

    Original Article Open access 20 May 2019 Article: 76

    

15. Associative learning is necessary for airborne pheromones to activate sexual arousal-linked brain areas of female rats

    • Yao-Hua Zhang
    • Ming-Ming Tang
    • Jian-Xu Zhang

    Original Article 15 May 2019 Article: 75

    

16. Fixed or flexible? Winner/loser effects vary with habitat quality in a parasitoid wasp

    • Marlène Goubault
    • Mylène Exbrayat
    • Ryan L. Earley

    Original Article 11 May 2019 Article: 74

    

17. The driving forces behind female-female aggression and its fitness consequence in an Asian agamid lizard

    • Yayong Wu
    • Martin J. Whiting
    • Yin Qi

    Original Article 09 May 2019 Article: 73

    

18. Aggression, color signaling, and performance of the male color morphs of a Brazilian lizard (Tropidurus semitaeniatus)

    • Andre C. Bruinjé
    • Felipe E. A. Coelho
    • Gabriel C. Costa

    Featured Student Research Paper 08 May 2019 Article: 72

    

19. Allomaternal care, brains and fertility in mammals: who cares matters

    • Sandra A. Heldstab
    • Karin Isler
    • Carel P. van Schaik

    Original Article 30 May 2019 Article: 71