Fig. (1) Map of locations for sampling (square) of Tufted and Black-crested Titmice. Counties west of the Balcones Escarpment (dashed line) include Kerr (1), Comal (2), Hays (3), and Travis (4). Counties east of the Escarpment are Williamson (5), Bastrop (6), Caldwell (7), Grimes (8), and Tyler (9). The extent of Titmouse species’ distribution range in Texas (dotted line) and central contact zone [26] (shaded oval) are also shown. Map modified from EnchantedLearning.com (2018).