|male "Anna's" racket-tail|
The booted racket-tails, a small group of hummingbirds in the genus Ocreatus that was long considered to have only one species, O. underwoodii; field research by Karl-L. Schuchmann published in 2016 found notable differences between some populations traditionally assigned to O. underwoodii, however, and recommended that the taxa annae, addae, and peruanus be raised to species level. The research results have been mostly accepted by the IOC, with more data required for the species status of Anna's racket-tail. The American Ornithological Society has yet to recognize the split.
- Peruvian racket-tail (Ocreatus peruanus)
- Rufous-booted racket-tail (Ocreatus addae)
- White-booted racket-tail (Ocreatus underwoodii)
- Schuchmann, Karl-L.; Weller, André-A.; Jürgens, Dietmar (2016). "Biogeography and taxonomy of racket-tail hummingbirds (Aves: Trochilidae: Ocreatus): Evidence for species delimitation from morphology and display behavior". Zootaxa. 4200 (1): 83. doi:10.11646/zootaxa.4200.1.3. PMID 27988640.
- "Proposed Splits/Lumps « IOC World Bird List".
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