Migration seems to have really begun in earnest this evening. I was out between 4:00 - 4:30 and heard 26+ Swainson's Thrushes, 2 Veeries, and 2-3 unidentified warblers calling as they flew over.  This comes after I only had 6 Swainson's & 2 Veeries the prior cloudy, drizzly night.

Twilight birds were also on the move.  Port Columbus Airport had 25+ Nighthawks this evening, well above the 0 and 2 that I've seen there the last 2 evenings.  This is the 'second wave' of migrant nighthawks; the first 'wave' was between Aug 24-29.  I don't know exactly what these waves represent, but a good guess would be local Ohio-Penn birds in the first wave, Ontario-Michigan birds in the second.  A smaller third wave often pushes through at the end of September, perhaps from further north in Canada.

Chimney Swifts are also massing.  I had 1100+ sweep into an established roost chimney in Whitehall (an inner-ring suburb of Columbus) this evening.  This is close to the peak number for this roost, and correlates with the 1700+ I had in an established Westerville roost several evenings ago.  If you have any nearby swift roosts (and nearly eveyone in Columbus does), the next week should be a great time to see this underappreciated migrant spectacle.

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