Self-tutoring about biological terms: the tutor mentions definitions of three related ones.
extinct: no longer existing anywhere.
extirpated: no longer existing in a place it used to. However, it still does exist elsewhere.
The trees and birds you see are members of extant species.
Extirpation happens commonly: the timber rattlesnake, for instance, is extirpated from Ontario, but still lives wild in many US states.
Source:Oracle Tutoring by Jack and Diane, Campbell River, BC.