"particular to a people or locality," 1650s (endemical), with -ic + Greek endemos "native, dwelling in (a place), of or belonging to a people," from en "in" (see en- (2)) + dēmos "people; district" (see demotic). From 1660s as a noun.
food shortages and starvation are endemic in certain parts of the world
diseases endemic to the tropics
the islands have a number of interesting endemic species
it is an endemic found only this island