2021 Editor's Choice Award and Editor's Choice Articles Kensuke Nakata Announcement 17 December 2021 Pages: 1 - 2
Cooperative den maintenance between male Japanese badgers that are delayed dispersers and their mothers Hiroshi TanakaYukihiro FukudaWataru Kojima Video Article Open access 06 August 2021 Pages: 3 - 11
Nest defence by woodpeckers from inside vs. outside the cavity against the intruder Martin PaclíkJan MisíkKarel Weidinger Article 19 August 2021 Pages: 13 - 21
Does food play a prominent role in visual attention to disgusting stimuli? Jana FančovičováPavol ProkopWilliam Medina-Jerez Article 31 August 2021 Pages: 23 - 29
Ant nesting site selection mediated by insects frass Kleber Del-ClaroDiego V. AnjosHelena Maura Torezan-Silingardi Article 30 September 2021 Pages: 31 - 36
Inter-population variation and phenotypic plasticity in kairomone use by a poly-specialist spider-eating predator Ana M. CerveiraRobert R. Jackson Article 11 October 2021 Pages: 37 - 48
Flipper rubbing reciprocity and partner choice in common bottlenose dolphins Chisato YamamotoToshiaki Ishibashi Article 30 November 2021 Pages: 49 - 59
Factors influencing the duration of death feigning in Eucryptorrhynchus scrobiculatus and E. brandti (Coleoptera: Curculionidae) Huijuan LiJunbao Wen Article 23 November 2021 Pages: 61 - 69
Effects of group composition on social foraging in cattle: inclusion of a leader cow in replacement of a follower facilitates expansion of grazing distribution patterns of beef cows Masahiko HirataAi MatsubaraMoeko Uchimura Article 29 November 2021 Pages: 71 - 78
The use of social information about predation risk by foraging house sparrows: a feeder experiment Alfréd TrnkaPeter Samaš Short Communication 14 August 2021 Pages: 79 - 84
Reddish male swallows have short sperm Masaru HasegawaEmi AraiMasahiko Nakamura Short Communication Open access 15 October 2021 Pages: 85 - 89
A preliminary study on habitat selection of the Japanese serow (Capricornis crispus) at two temporal scales, season and time of day, in a montane forest Hayato TakadaMasato Minami Short Communication 23 October 2021 Pages: 91 - 95
Carpe diem: winner and loser effects are constrained to same-day competitions in collegiate baseball Omar Tonsi EldakarNatalie BuckwoldAndrew C. Gallup Short Communication 19 October 2021 Pages: 97 - 101
Observation of yawn-like behavior in a dugong (Dugong dugon) Akiko EnokizuTadamichi MorisakaMotoi Yoshioka Short Communication 27 November 2021 Pages: 103 - 108
Correction to: Whale shark (Rhincodon typus) predatory flexible feeding behaviors on schooling fish Austin N. Montero-QuintanaCarlos F. Ocampo-ValdezMarcela Osorio-Beristain Correction 14 September 2021 Pages: 109 - 109
Correction to: Wing‑waving behaviors are used for conspecific display in the Japanese scorpionfly, Panorpa japonica Ryo IshiharaTakahisa Miyatake Correction Open access 06 December 2021 Pages: 111 - 111
Correction to: An empirical test of bet-hedging polyandry hypothesis in the field cricket Gryllus bimaculatus Yukio YasuiYuto Yamamoto Correction Open access 08 December 2021 Pages: 113 - 113
Correction to: Another usage of autotomized penis Ayami SekizawaYurika TsurumiYasuhiro Nakashima Correction Open access 14 December 2021 Pages: 115 - 115
Correction to: Whale shark (Rhincodon typus) predatory flexible feeding behaviors on schooling fish Austin N. Montero-QuintanaCarlos F. Ocampo-ValdezMarcela Osorio-Beristain Correction Open access 08 December 2021 Pages: 117 - 117
Correction to: Effects of habitat conditions on the boldness and sociability of wild‑caught fish (Zacco platypus) along a river Zhonghua TangShi‑Jian Fu Correction Open access 11 December 2021 Pages: 119 - 119
Correction to: Defensive spray by a semiaquatic osmylid larva (Insecta: Neuroptera) for both aquatic and terrestrial predators Tsukuru IwanamiPei YuFumio Hayashi Correction Open access 15 December 2021 Pages: 121 - 121
