The Spotted Owl is considered an endangered species in the western United States, largely due to competition from the introduced Barred Owl. These two species are genetically similar and are believed to have speciated from a common ancestor after separation of the two populations on opposite coasts of the United States. This is an example of:

W) Allopatric speciation

X) Sympathetic speciation

Y) Symatric speciation

Z) Genetic drift
W) ALLOPATRIC SPECIATION