The Sonoran pronghorn, one of the United States' rarest large mammals, is unique in that it is smaller and lighter-colored than other pronghorn subspecies, having evolved these adaptations to survive in an arid desert environment.
(The Sonoran pronghorn; is; unique) (it; is; smaller and lighter-colored than other pronghorn subspecies, having evolved these adaptations)
The Sonoran pronghorn it
is is
unique
smaller and lighter-colored than other pronghorn subspecies, having evolved these adaptations