Willow Flycatcher singing after dark?

[thouc]

I heard several birds singing just after dark (9:45 pm). They sounded like Willow Flycatchers, do they sing after dark, or is there something else that sounds similar?

/Thomas

[John]

The Birds of North America account states: "[Willow Flycatchers] often have a singing bout beginning after sunset and continuing for about 40 min (McCabe 1951, Weydemeyer 1973)."

[thouc]

Thanks, then it was Willow Flycatcher. I didn't know they sang after sunset.

/Thomas