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Figure 1. Comparisons of the terminal elements of several parula songs. From left to right: "Tropical" Parula with subocular eye crescent recorded at Anzalduas Co Park; "Tropical" Parula with subocular eye crescent recorded at the Kenedy Ranch in the late 1990's; Western-type Northern Parula; Eastern type Northern Parula; and Tropical Parula. Note that both potential Texas hybrids have terminal elements resembling Tropical Parula. | ||
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