Our fountain is the local watering hole for the neighborhood birds. The poor little finches are in a panic. They can't find any water to drink. How do the birds survive back east where all the water sources are frozen for weeks at a time?
Of course I'm ragging you. It's 40 out here and only the polar bears are swimming today.
There's almost always water if the sun comes out. Otherwise I don't know what the birds water requirements are.
I wouldn't want to be a bird.
Standing water freezes, but water sources do not. We see seagulls here all the time. They're drawn to our asphalt parking lots, which warm up nicely.
On any sunny day, what was frozen will melt somewhere, at least a little bit, and especially so if it is near a dark, absorptive color.
On cold dark days, most birds use their secret stash, or even their fat reserves, but the ones who winter here typically have a moist diet anyway, finding insects under leaves and such. Also, you'd be surprised how many water sources there are in say a quarter mile radius. Even the dew or frost in the morning is enough to sustain a small bird.
It's about sixty here, and I just went out to chop some wood. Boy! Did it warm up quickly! First the sweater came off, and I was tempted to remove my flannel shirt, but prudence prevailed, and I came back inside to cool off.