I notice that a larger number of species move N into Ontario across Lk
Erie than N into BC through Wash. Many species found in BC migrate AROUND
WA into BC, so we rarely find them. Also, our migrations here simply do
not compare with those almost anywhere back east; the sheer numbers of
individuals and species just aren't here in the West. Further, many of
those which do migrate in this area do so offshore, where they will not
contribute to the oases which birders seek. In short, the Pt. Pelee
phenomenon is partially offset by the presence of the Pacific ocean, which
helps to right the numerical balance between East/Midwest and Northwest, but
doesn't create many oases in the process.