Western Meadowlarks and ice

Today I was counting raptors (hawks, eagles and falcons) in the wheat country of north-central Oregon. Along the way I saw lots of other birds that were finding ways to survive the freezing weather over there. I can't remember ever seeing Western Meadowlarks perching in trees before, but somewhere near the town of Ione there was a whole flock in an ice-covered tree. They took off with a flurry when a Northern Harrier came too close, and the ice falling from the branches sounded like breaking glass.