Quiscalus quiscula
I do not recall seeing Grackles here in previous years, although others have, I am sure. At first I thought these were the Brewer's Blackbirds, which have nested in our back yard every year for the past ten or more years. But these are larger birds, have a much more robust beak, and are bronze-colored on their backs (in the right light). The last few days, we have had groups of 5-6 pass through the back yard and see if there is anything interesting here to do.