Used to hear the mockingbird 5 a.m. and he didn't stop

ALL day-I LOVED IT! Then the cardinals would reve up their

'Lululululululu' and the jays would chime in and the crows

would cacophanate. Even the robins would occasionally lend a voice.

but for the last few weeks-total silence!

It is so sad and lonely without the birdsongs.

What happened?

Is this normal (here in the Boston area)???