Hackett, S. J.; Kimball, R. T.; Reddy, S.; Bowie, R. C. K.; Braun, E. L.; Braun, M. J.; Chojnowski, J. L.; Cox, W. A.; Han, K.-L. (2008). "A Phylogenomic Study of Birds Reveals Their Evolutionary History". Science. 320 (5884): 1763–1768. Bibcode:2008Sci...320.1763H. doi:10.1126/science.1157704. PMID18583609. S2CID6472805.
Oliveros, Carl H.; Andersen, Michael J.; Hosner, Peter A.; Mauck, William M.; Sheldon, Frederick H.; Cracraft, Joel; Moyle, Robert G. (2020). "Rapid Laurasian diversification of a pantropical bird family during the Oligocene–Miocene transition". Ibis. 162 (1): 137–152. doi:10.1111/ibi.12707. ISSN1474-919X.
Windsor, D. M. (1976). "Birds as Predators on the Brood of Polybia Wasps (Hymenoptera: Vespidae: Polistinae) in a Costa Rican Deciduous Forest". Biotropica. 8 (2): 111–116. doi:10.2307/2989631. JSTOR2989631.
Riehl, Christina (2008). "Communal Calling And Prospecting By Black-Headed Trogons (Trogon melanocephalus)". The Wilson Journal of Ornithology. 120 (2): 248–255. doi:10.1676/07-025.1. S2CID83762310.
Hackett, S. J.; Kimball, R. T.; Reddy, S.; Bowie, R. C. K.; Braun, E. L.; Braun, M. J.; Chojnowski, J. L.; Cox, W. A.; Han, K.-L. (2008). "A Phylogenomic Study of Birds Reveals Their Evolutionary History". Science. 320 (5884): 1763–1768. Bibcode:2008Sci...320.1763H. doi:10.1126/science.1157704. PMID18583609. S2CID6472805.
Windsor, D. M. (1976). "Birds as Predators on the Brood of Polybia Wasps (Hymenoptera: Vespidae: Polistinae) in a Costa Rican Deciduous Forest". Biotropica. 8 (2): 111–116. doi:10.2307/2989631. JSTOR2989631.
Hackett, S. J.; Kimball, R. T.; Reddy, S.; Bowie, R. C. K.; Braun, E. L.; Braun, M. J.; Chojnowski, J. L.; Cox, W. A.; Han, K.-L. (2008). "A Phylogenomic Study of Birds Reveals Their Evolutionary History". Science. 320 (5884): 1763–1768. Bibcode:2008Sci...320.1763H. doi:10.1126/science.1157704. PMID18583609. S2CID6472805.
Hackett, S. J.; Kimball, R. T.; Reddy, S.; Bowie, R. C. K.; Braun, E. L.; Braun, M. J.; Chojnowski, J. L.; Cox, W. A.; Han, K.-L. (2008). "A Phylogenomic Study of Birds Reveals Their Evolutionary History". Science. 320 (5884): 1763–1768. Bibcode:2008Sci...320.1763H. doi:10.1126/science.1157704. PMID18583609. S2CID6472805.
Riehl, Christina (2008). "Communal Calling And Prospecting By Black-Headed Trogons (Trogon melanocephalus)". The Wilson Journal of Ornithology. 120 (2): 248–255. doi:10.1676/07-025.1. S2CID83762310.
Oliveros, Carl H.; Andersen, Michael J.; Hosner, Peter A.; Mauck, William M.; Sheldon, Frederick H.; Cracraft, Joel; Moyle, Robert G. (2020). "Rapid Laurasian diversification of a pantropical bird family during the Oligocene–Miocene transition". Ibis. 162 (1): 137–152. doi:10.1111/ibi.12707. ISSN1474-919X.