Lysurus crassirostris (Cassin, 1865)
| On a second collection of birds made in Chiriqui Outram Bangs (1902) Proceedings of the New England Zoölogical Club 3: 15-70 | |
| Mammals of Panama Edward A Goldman (1921) Smithsonian miscellaneous collections 69(5): 1-309 | |
| Birds of Volcan de Chirique, Panama E R Blake (1958) Fieldiana (Zool.) 36: 497-577 |