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Journal of Evolutionary Biology|April 5, 2020
Fork tails evolved differently in swallows and swiftsMasaru Hasegawa, Emi AraiZoological Science|November 9, 2013
Differential female access to males with large throat patches in the Asian barn swallow Hirundo rustica gutturalisMasaru Hasegawa, Emi AraiJournal of Evolutionary Biology|November 9, 2020
Opposing population trends of fork-tailed swallows and reddish-coloured swallows in our changing worldMasaru Hasegawa, Emi AraiEcology and Evolution|January 30, 2018
Sexually dimorphic swallows have higher extinction riskMasaru Hasegawa, Emi AraiZoological Science|May 24, 2019
Small, Variable Sperm in a Barn Swallow Population with Low Extra-Pair PaternityMasaru Hasegawa, Emi Arai, Masahiko NakamuraBehavioural Processes|March 5, 2025
Good sperm producers are more likely to participate in incubation in the Asian barn swallow Hirundo rustica gutturalisMasaru Hasegawa, Emi Arai, Masahiko NakamuraEcology and Evolution|February 12, 2016
Evolution of tail fork depth in genus HirundoMasaru Hasegawa, Emi Arai, Nobuyuki KutsukakeZoological Science|August 4, 2017
Plasma Testosterone Levels Increase with Expression of Male Ornaments During Mating, but not Incubation, in Japanese Barn SwallowsMasaru Hasegawa, Emi Arai, Megumi Sato, et al.Zoological Science|December 6, 2025
Condition-Dependent Feather Color Change and Condition-Independent Pheomelanin Loss in the Barn SwallowMasaru Hasegawa, Emi Arai, Shosuke Ito, et al.Zoological Science|December 7, 2018
Males with More Pheomelanin Have a Lower Oxidative Balance in Asian Barn Swallows (Hirundo rustica gutturalis)Emi Arai, Masaru Hasegawa, Kazumasa Wakamatsu, et al.Pageof 2