1. Insulin-like growth factor 1 is related to the expression of plumage traits in a passerine species

   • Katharina Mahr
   • Orsolya Vincze
   • Ádám Z. Lendvai

   Original Article Open access 10 March 2020 Article: 39

   

2. Similarity at the major histocompatibility complex class II does not influence mating patterns in bluegill (Lepomis macrochirus)

   • Lucas Silveira
   • Shawn R. Garner
   • Bryan D. Neff

   Original Article 10 March 2020 Article: 38

   

3. Great tit responses to the calls of an unfamiliar species suggest conserved perception of call ordering

   • Mylène Dutour
   • Toshitaka N. Suzuki
   • David Wheatcroft

   Original Article 10 March 2020 Article: 37

   

4. Older males are more competitive in male fights and more aggressive toward females in the broad-horned flour beetle Gnatocerus cornutus

   • Kensuke Okada
   • Masako Katsuki
   • Yasukazu Okada

   Original Article 05 March 2020 Article: 36

   

5. Queen loss changes behavior and increases longevity in a stingless bee

   • Bárbara dos Santos Conceição Lopes
   • Alistair John Campbell
   • Felipe Andrés León Contrera

   Original Article 05 March 2020 Article: 35

   

6. Do female rainbow kribs choose males on the basis of their apparent aggression and boldness? A non-correlational mate choice study

   • Ulrike Scherer
   • Jean-Guy J. Godin
   • Wiebke Schuett

   Original Article Open access 03 March 2020 Article: 34

   

7. Queen honey bee (Apis mellifera) pheromone and reproductive behavior are affected by pesticide exposure during development

   • Elizabeth M. Walsh
   • Stephen Sweet
   • Juliana Rangel

   Featured Student Research Paper 26 February 2020 Article: 33

   

8. Habitat-based isolating barriers are not strong in the speciation of ecologically divergent squirrels (Tamiasciurus douglasii and T. hudsonicus)

   • Alexander T. Fotis
   • Sahil Patel
   • Andreas S. Chavez

   Original Article 20 February 2020 Article: 32

   

9. Proactive common waxbills make fewer mistakes in a cognitive assay, the detour-reaching task

   • Ana Cristina R. Gomes
   • Soraia Guerra
   • Gonçalo C. Cardoso

   Original Article 20 February 2020 Article: 31

   

10. The effect of offspring value on variation of nest defense intensity in gray catbirds (Dumetella carolinensis)

    • Lucas J. Redmond
    • Craig Eroh
    • Dominique Varra

    Original Article Open access 20 February 2020 Article: 30

    

11. Consequences of experimental addition of fresh, aromatic plants into nests of blue tits (Cyanistes caeruleus) on the physiological condition of nestlings

    • Michał Glądalski
    • Mirosława Bańbura
    • Jerzy Bańbura

    Original Article Open access 12 February 2020 Article: 29