Species
Species means any species, any subspecies, or any district population segment of a species or subspecies, and includes hybrids of any species or subspecies. Hybrids will be treated according to the more restrictive appendix or category in which either parental species is listed.
Source
50 CFR § 15.3
Scoping language
In addition to the definitions contained in parts 10 and 23 of this subchapter B, and unless the context requires otherwise, in this part: