What is the approximate eastern boundary of the Vermilion Flycatcher in Texas?

Answer

The Balcones Escarpment

While the species is prevalent throughout the Trans-Pecos and Edwards Plateau regions of Texas, the Balcones Escarpment typically acts as the eastern limit. They generally avoid the heavily wooded canyonlands found between Austin and San Antonio, preferring the more open, arid environments to the west.

What is the approximate eastern boundary of the Vermilion Flycatcher in Texas?
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