The Big Thicket region is made up of roughly 3.5 million acres of heavily forested area, with a national preserve of over 113,000 acres of public land, with six water corridors and a complex mosaic of ecosystems and plant diversity. This area is the most dense forest region of Texas, and features more than 160 species of trees and shrubs. Conservatively, this area occupies all of Hardin County, most of Polk and Tyler Counties, and parts of Jasper, Liberty and San Jacinto Counties, including areas between the Neches River on the east, the Trinity River on the west, and the Pine Island Bayou on the south. This same habitat extends into Louisiana and eastward.
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