Barreto, E, Lim, M C W, Rojas, D, Dávalos, L M, Wüest, R O, Machac, A & Graham, C H 2023, ' Morphology and niche evolution influence hummingbird speciation rates ', Proceedings of the Royal Society B: Biological Sciences, vol. 290, no. 1997, 20221793 . https://doi.org/10.1098/rspb.2022.1793