↑ abOliveros, C.H. (2019). Earth history and the passerine superradiation. Proceedings of the National Academy of Sciences of the United States of America116 (16): 7916–7925. PMID30936315. PMC6475423. DOI: 10.1073/pnas.1813206116.
↑Gill, F, D Donsker, and P Rasmussen (Eds). 2023. IOC World Bird List (v 13.2). Doi 10.14344/IOC.ML.13.2 [1]