1. To hatch and hatch not: does heterochrony in onset of vestibular mechanosensing explain species differences in escape-hatching success of Agalychnis embryos in snake attacks?

   • Brandon A. Güell
   • Karen M. Warkentin

   Original Article 15 December 2023 Article: 141

   

2. Maternal parity influences the birth sex ratio and birth interval of captive Francois’ langur (Trachypithecus francoisi)

   • Bojun Yi
   • Song Wang
   • Penglai Fan

   Original Article 14 December 2023 Article: 140

   

3. Testing presence of directionality information in female spider silk trails through male trail-following behavior

   • Michelle Beyer
   • Kardelen Özgün Uludag
   • Cristina Tuni

   Original Article Open access 14 December 2023 Article: 139

   

4. Sexual selection on a female copulatory device in an insect with nuptial gifts

   • Jessica H. Browne
   • Darryl T. Gwynne

   Original Article 12 December 2023 Article: 138

   

5. Kinship study reveals stable non-kin-based associations in a medium-sized delphinid

   • Karin L. Hartman
   • Ing Chen
   • A. Rus Hoelzel

   Original Article 12 December 2023 Article: 137

   

6. Experimental manipulation of chest spotting alters territorial aggression in urban and rural song sparrows

   • Michelle L. Beck
   • Kendra B. Sewall
   • Ҫağlar Akҫay

   Original Article Open access 12 December 2023 Article: 136

   

7. Testing the factors on the evolution of movement-based visual signal complexity in an Asian agamid lizard

   • Yusong Lin
   • Xia Qiu
   • Yin Qi

   Original Article 11 December 2023 Article: 135

   

8. Reproductive success of Bornean orangutan males: scattered in time but clustered in space

   • Maria A. van Noordwijk
   • Laura R. LaBarge
   • Carel P. van Schaik

   Original Article Open access 06 December 2023 Article: 134

   

9. Transition in the production of diploid-female to haploid-male eggs in bumblebee colonies: sperm quality or depletion?

   • Baptiste Martinet
   • Kimberly Przybyla
   • Serge Aron

   Original Article 01 December 2023 Article: 133

   

10. The role of partially consumed acorn remains in scatter hoards and their implications in oak colonization

    • Sergio Del Arco
    • Jose María Del Arco

    Original Article Open access 30 November 2023 Article: 132

    

11. Heliconiini butterflies as a case study in evolutionary cognitive ecology: behavioural innovation and mushroom body expansion

    • Fletcher J. Young
    • Stephen H. Montgomery

    Review Open access 28 November 2023 Article: 131

    

12. Behavioral responses of two African mesopredators to human and non-human apex predators

    • Rebecca J. Welch
    • Craig J. Tambling
    • Dan M. Parker

    Original Article 27 November 2023 Article: 130

    

13. Avian nuptial plumage coloration changes differently when exposed to urban and rural areas

    • Adrian Surmacki
    • Lynn Siefferman
    • Anna Plackowska

    Original Article Open access 24 November 2023 Article: 129

    

14. Ecological drivers of bee cognition: insights from stingless bees

    • João Marcelo Robazzi Bignelli Valente Aguiar
    • Rafael Carvalho da Silva
    • Michael Hrncir

    Review 23 November 2023 Article: 128