Birds do sing at night

The commonly held belief that birds don’t sing at night is bunk.  At least, the birds around here don’t seem to have any problem making noise right outside my bedroom window at 4:30 am, a full two hours before sunrise.  For several years now, mockingbirds have made nests in the bushes about 20 feet from the bedroom window.  Although I’m not sure that this morning’s songster (or songstress) was in fact a mockingbird, I’m reasonably certain.  I’ve never heard a bird with this particular call.  I don’t know if the song was a combination of the songs of multiple birds or if it was emulating some environmental noise, but you’ll understand, after listening to the recording, why I nicknamed it “Sprinkler Bird.”