It’s hard to avoid the subject of migration this time of year. Each week, perhaps each day brings new species leaving, arriving, or passing through this avian crossroads of an archipelago we all inhabit. Whether you are a connoisseur of the showy wading birds, an aficionado of the summer seabirds, or a fancier of waterfowl, there is something for everyone in mid-September. Unless of course, you don’t like wildlife, in which case you should probably switch to sports talk radio for a few minutes.