by M. Kathy Raines New to the rigors of warbler identification—an exasperatingly large number of these charmers being yellow, adorned with varying patterns of black—I thrill to spotting, and confidently IDing, the lovely and lively zebra-striped black-and-white warbler (Mniotilta varia). This five-inch wood warbler, in the family Parulida—which includes small, primarily arboreal, insectivorous New World…