Buff-bellied Hummingbird (Amazilia yucatanensis) [XC505913]
by Leonardo Guzman Hernandez from Alamo, Hidalgo County, Texas, United States (call)
Buff-bellied Hummingbird (Amazilia yucatanensis) [XC340495]
by Paul Marvin from Estero Llano Grande State Park, Weslaco, Hidalgo, Texas, United States (call)
Subspecies
Forms a superspecies with Cinnamon Hummingbird (Amazilia rutila), but not, as sometimes suggested, with Rufous-tailed Hummingbird (Amazilia tzacatl) and Loja Hummingbird (Amazilia alticola). Subspecies cerviniventris formerly treated as a distinct species, including subspecies chalconota.
The following 3 subspecies are recognised:
chalconota Oberholser, 1898 - Extreme southern USA (Texas) to north-eastern Mexico (south to San Luis Potosí).