by M. Kathy Raines Grackles—people either love them, or they decidedly do not. From first glimpse of a sleek, iridescent, purplish-hued great-tailed grackle (Quiscalus mexicanus), I have been smitten. I admire grackles’ regal tails, brash bearing and intriguingly varied vocalizations—clacks. shrieks, croaks and ascending whistles; they create a poignant symphony reminiscent of Stravinsky.  Yet these…