Bogota Sunangel (Heliangelus zusii) is currently listed as Data Deficient (BirdLife International 2019). Following a molecular phylogenetic analysis by Pérez-Emán et al. (2019), it was deemed that specimens placed as this species actually more likely represent hybrids between a female Long-tailed Sylph (Aglaiocercus kingii) and a male Heliangelus or Metallura hummingbird. Based on this assessment, Bogota Sunangel is no longer considered to be valid.
Long-tailed Sylph (Aglaiocercus kingii) is not thought to approach the thresholds for listing as Vulnerable under any criterion and will be listed as Least Concern.
BirdLife International (2019) Species factsheet: Heliangelus zusii. http://www.birdlife.org (Accessed 29/04/2019).
Pérez-Emán, J. L.; Perdigón Ferreira, J.; Gutierrez-Pinto, N.; Cuervo, A. M.; Céspedes, L. N.; Witt, C. C.; Cadena, C. D. 2018. An extinct hummingbird species that never was: a cautionary tale about sampling issues in molecular phylogenetics. Zootaxa 4442 (3): 491-497.