Proceedings of the Royal Society B: Biological Sciences Proceedings of the Royal Society B: Biological Sciences, Royal Society, The, 2019, 286 (1894), pp.20182273. ⟨10.1098/rspb.2018.2273⟩ Proceedings of the Royal Society B: Biological Sciences, 2019, 286 (1894), pp.20182273. ⟨10.1098/rspb.2018.2273⟩