Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2019. The eBird/Clements Checklist of Birds of the World: v2019. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/ (Downloaded 12 June 2020).
Gahr M (2000). “Neural song control system of hummingbirds: comparison to swifts, vocal learning (Songbirds) and nonlearning (Suboscines) passerines, and vocal learning (Budgerigars) and nonlearning (Dove, owl, gull, quail, chicken) nonpasserines”. J Comp Neurol426 (2): 182–96. doi:10.1002/1096-9861(20001016)426:2<182::AID-CNE2>3.0.CO;2-M. PMID10982462.
Suarez, R. K.; Gass, C. L. (2002). “Hummingbirds foraging and the relation between bioenergetics and behavior”. Comparative Biochemistry and Physiology. Part A 133 (2): 335–343. doi:10.1016/S1095-6433(02)00165-4. PMID12208304.
Lotz, Chris N.; Martínez Del Rio, Carlos (2004). “The ability of rufous hummingbirds Selasphorus rufus to dilute and concentrate urine”. Journal of Avian Biology35: 54–62. doi:10.1111/j.0908-8857.2004.03083.x.
Gahr M (2000). “Neural song control system of hummingbirds: comparison to swifts, vocal learning (Songbirds) and nonlearning (Suboscines) passerines, and vocal learning (Budgerigars) and nonlearning (Dove, owl, gull, quail, chicken) nonpasserines”. J Comp Neurol426 (2): 182–96. doi:10.1002/1096-9861(20001016)426:2<182::AID-CNE2>3.0.CO;2-M. PMID10982462.
Suarez, R. K.; Gass, C. L. (2002). “Hummingbirds foraging and the relation between bioenergetics and behavior”. Comparative Biochemistry and Physiology. Part A 133 (2): 335–343. doi:10.1016/S1095-6433(02)00165-4. PMID12208304.