Saw the wave again this morning before the sun was up.   This time it was a twisting mass spread out along the line of flight -- to the east.   Birds were low, housetop to treetop level.   Only a block away to the south but I couldn't see what they were.

I suppose they are nesting in trees in town and then going east either to the canyon lakes where there is plenty of water, or heading out to feed on grain in a field somewhere.    Grackles seem to do that, fly west in the evening and east in the morning, but do so in smaller numbers and often as single birds.

And this morning on a limb outside the kitchen door window, two curvebill thrashers by a feeder.    I took them more food.   One bird let me come to within two feet to put in seed.    Haven't seen them together like that before.

The male and female pyrrhuloxia have been coming to eat at about the same time, which may indicate that they too are pairing off.

The doves are always paired off and horny.