We had another wave of the little guys last night,
because they were much in evidence this morning. Another flock of Robins and another flock of Blue Jays. And a bunch of warblers - some singing, for no good reason, and if you don't know their calls, you cannot identify fall warblers unless you are an expert. In their non-breeding plumage, they all look alike.
Among other birds, had a migrating Phoebe this morning, snagging bugs on the driveway. One of my favorite birds. This common flycatcher likes to nest on or near houses, bridges, etc., has a sweet song, and is readily identified without binocs by his tail-wagging. Some of the other flycatchers are far more challenging.
Birders often claim that waves of migrants tend to precede cold fronts. That could be true. On the other hand, there are always cold fronts coming during migration season. Anyway, many species do pass through in waves.
The Eastern Phoebe image borrowed from CLO. More about the likeable Phoebe here.