It is September now — a new month and a new stage of avian migration.

It’s about time. We have been waiting for a few species of shorebirds that generally show up in August. Well, sure enough, here they are.

Potential reasons for this low productivity include human disturbance, predation and the weather.

Everything else eats insects at this time of the year, so why not a harrier?

Two weeks ago it was shearwaters, last week it was the brown booby and now it is a phalarope.

Unexpected is not an understatement. A brown booby is a pelagic species that some birders make special trips to the Dry Tortugas to see.