Ecosystems On a larger scale of
ecoregions of the United States, the Big Thicket is part of the
Piney Woods. The Big Thicket is located in the southwest of the Piney Woods and transitions into the
Western Gulf coastal grasslands immediately to the south. To the west are the
Texas Blackland Prairies and
East Central Texas forests (a.k.a. post-oak savanna). Within the Big Thicket, a major component in the high diversity of plants and animals is the variety of
ecosystems present in a relatively small area. The National Park Service identifies eight plant communities in Big Thicket National Preserve. Some biologist and plant ecologists identify as many as nine, ten, or eleven ecosystems in the Big Thicket. habitat. Big Thicket National Preserve, Turkey Creek Unit, Hardin Co. Texas; 16 April 2020
Cypress slough in the Big Thicket region of southeast Texas. Liberty Co. Texas; 22 May 2020
Mixed-grass prairies:
Mammals: About 54 species of mammals occur in the Big Thicket (not counting extirpated species), including such species as the Virginia opossum (
Didelphis virginiana), nine-banded armadillo (
Dasypus novemcinctus), short-tailed shrew (
Blarina carolinensis), American beaver (
Castor canadensis), Baird's pocket gopher (
Geomys breviceps), southern flying squirrel (
Glaucomys volans), white-tailed deer (
Odocoileus virginianus), eastern spotted skunk (
Spilogale putorius), American mink (
Mustela vison), river otter (
Lontra canadensis), coyote (
Canis latrans), gray fox (
Urocyon cinereoargenteus), bobcat (
Lynx rufus), and Rafinesque's big-eared bat (
Corynorhinus rafinesquii) a threatened species in Texas. Although many of these species are common, they can be highly secretive and are seldom seen in the dense woodlands. Many prominent species that once occurred in the Big Thicket have been
extirpated from their historical ranges. Examples include hog-nosed skunks (
Conepatus leuconotus), red wolves (
Canis rufus), ocelots (
Leopardus pardalis), and jaguars (
Panthera onca). File:Picoides borealis USMC2005729133853B.jpg|Red-cockaded woodpecker File:Bachman's Sparrow, Hal Scott Reserve, Florida 3.jpg|Bachman's sparrow (
Peucaea aestivalis), Hal Scott Reserve, Florida File:Scissor-tailed Flycatcher (Tyrannus forficatus) Walker Co. TX. photo W. L. Farr.jpg|Scissor-tailed flycatcher (
Tyrannus forficatus) in Walker County File:Painted Bunting - Texas - USA H8O2367 (23443730189).jpg|Painted bunting (
Passerina ciris), Texas File:Yellow-crowned Night-heron (Nyctanassa violacea) Harris Co. TX. photo W. L. Farr.jpg|Yellow-crowned night-heron (
Nyctanassa violacea) in Harris County File:White Ibis (Eudocimus albus) showing adult (left) and immature (right) plumage, Trinity River National Wildlife Refuge, Texas.jpg|White ibis (
Eudocimus albus) adult and immature plumage, Trinity River National Wildlife Refuge File:Wood ducks (Aix sponsa) (a557702f-eab3-43fd-bef4-837c129b7775) (cropped).JPG|Wood ducks (
Aix sponsa), Big Thicket NP, camara trap
Reptiles: Sixty-one species of reptiles are known from the Big Thicket area including the alligator, 15 turtles, 12 lizards, and 33 snakes. Along with birds, reptiles are among the more commonly seen wildlife and they are an important part of the forest community or ecosystems. The American alligator (
Alligator mississippiensis), although somewhat uncommon, occurs throughout the Big Thicket where sufficient water is found. However, alligators are abundant in the open marshland of Chambers and Jefferson counties to the south, where they bask in the sun unobstructed by forest trees. The snapping turtle family (
Chelydridae) is found only in the New World with two genera, both represented in the Big Thicket, the common snapping turtle (
Chelydra serpentina) and the alligator snapping turtle (
Macrochelys temminckii). The alligator snapping turtle is the largest freshwater turtle in North America and one of the larger freshwater turtles in the world. One record sized individual with a shell has been documented, and another captive specimen recorded, however, and is the typical adult size. whereas the legless western slender glass lizard (
Ophisaurus attenuatus) prefers areas of dense grasses with sandy soils. Three lizards barely range into peripheral counties, including two rare skinks, the southern prairie skink (
Plestiodon septentrionalis) in the west and the coal skink (
Plestiodon anthracinus) in the northeast; and the Texas spiny lizard (
Sceloporus olivaceus), common to the west, but rare in a few western Big Thicket counties. Most records of the state reptile, the Texas horned lizard (
Phrynosoma cornutum), from east Texas are from the early and mid-twentieth century when they were popular pets, and are thought to represent released or escaped pets and not the species natural range. Two invasive species, the brown anole (
Anolis sagrei) and the nocturnal Mediterranean gecko (
Hemidactylus turcicus), are found there. There are five species of venomous snakes in the area. Two rattlesnakes, the pygmy rattlesnake (
Sistrurus miliarius) and the canebrake or timber rattlesnake (
Crotalus horridus) are both uncommon to rare. Timber rattlesnakes are a threatened species in Texas, as they are in most states where they occur and are protected by state laws. Common toads and frogs include the Gulf Coast toad (
Incilius nebulifer), Blanchard's cricket frog (
Acris blanchardi), green tree frog (
Hyla cinerea), squirrel tree frog (
Hyla squirella), spring peeper (
Pseudacris crucifer), eastern narrow-mouth toad (
Gastrophryne carolinensis), American bullfrog (
Lithobates catesbeianus), bronze frog (
Lithobates clamitans), and southern leopard frog (
Lithobates sphenocephalus). Two other frequently encountered tree frogs, Cope's gray tree frog (
Hyla chrysoscelis) and the gray tree frog (
Hyla versicolor), are identical in appearance and can only be distinguished by subtle differences in their calls or by laboratory analysis. The East Texas toad, commonly seen in the Big Thicket, has been controversial among herpetologist and taxonomist, some arguing that it is a distinct species (
Anaxyrus velatus) while others argue that it is a hybrid between Woodhouse's toad (
Anaxyrus woodhousii) found to the west and Fowler's toad (
Anaxyrus fowleri) found to the east. Two rare and highly secretive frogs are the pickerel frog (
Lithobates palustris) and the southern crawfish frog (
Lithobates areolatus) which is a
fossorial species, spending much of its time in crayfish burrows and other small cavities in the ground. One
invasive species, the small Rio Grande chirping frog (
Syrrhophus cystignathoides), is native to the
Rio Grande Valley and Mexico but, it does not appear pose an ecological threat to other species as invasive species often do. File:Small-mouthed Salamander (Ambystoma texanum) Liberty Co. Texas. photo by W. L. Farr.jpg|Small-mouthed salamander (
Ambystoma texanum) in Liberty County File:Dwarf Salamander (Eurycea quadridigitata) Polk Co. Texas. W. L. Farr.jpg|Dwarf salamander (
Eurycea quadridigitata) in Polk County File:Eastern Newt (Notophthalmus viridescens) Walker Co. Texas. photo by W. L. Farr.jpg|Eastern newt (
Notophthalmus viridescens) in Walker County File:East Texas Toad (Anaxyrus velatus or woodhousii x fowleri) Hardin Co. Texas. photo by W. L. Farr.jpg|East Texas toad (
Anaxyrus velatus or
woodhousii ×
fowleri) in Hardin County File:Eastern Narrow-mouth Toad, (Gastrophryne carolinensis) Liberty Co. Texas. photo by W. L. Farr.jpg|Eastern narrow-mouth toad, (
Gastrophryne carolinensis) in Liberty County File:Gray Treefrog (Hyla versicolor) Montgomery Co. Texas. photo by W. L. Farr.jpg|Gray treefrog (
Hyla versicolor) in Montgomery County File:Green Treefrog (Hyla cinerea) Hardin Co. Texas. photo by W. L. Farr.jpg|Green treefrog (
Hyla cinerea) in Hardin County
Fishes: Well over 90 species of fishes are known from the area. The Big Thicket National Preserve inventoried 92 species in the preserve's waters and another 20 species are noted as possible occurrences. The National Park Service checklist includes 104 species. Others source note 98 species In the smaller tributaries the most abundant species are minnows, killifishes, darters, bass, and bullhead catfish, while larger creeks and bayous are dominated by channel, blue, and flathead catfish, sunfishes, largemouth and spotted bass, and crappie. Dragonflies and damselflies (
Odonata): Damselflies typically sit with their wings together, closed over their backs. Dragonflies sit with their wings spread. Collectively over 120 species occur in the Big Thicket area. They are often associated with water where they lay their eggs. Most species have preferences in the water they frequent, such as moving water vs. still water, streams, ponds, marshes etc. The Needham's skimmer (
Libellula needhami) lay their eggs in flight, while the ebony jewelwing (
Calopteryx maculata) submerges for up to two hours while depositing eggs. The nymphs are aquatic. Both the larva and adults are fierce predators, feeding primarily on insects. They are frequently
sexually dimorphic and males and females may have different colors and patterns. Some species like the roseate skimmer (
Orthemis ferruginea) and common green darner (
Anax junius) can be seen in their adult form year round. Others are limited to a few weeks or mouths each year like the calico pennant (
Celithemis elisa) flying April - August and Needham's skimmer (
Libellula needhami) flying May - September. The Texas emerald (
Somatochlora margarita) and the rare and sarracenia spiketail (
Cordulegaster sarracenia) are endemic to southeast Texas and adjacent areas of Louisiana. File:1. Common green darner (Anax junius), male, Liberty County.jpg|Common green darner (
Anax junius), male, Liberty County File:2. Ebony Jewelwing (Calopteryx maculata), male, San Jacinto County.jpg|Ebony jewelwing (
Calopteryx maculata), male, San Jacinto County File:3. Needham's Skimmer (Libellula needhami) female, Harris Co County.jpg|Needham's skimmer (
Libellula needhami) female, Harris Co County File:4. Calico Pennant (Celithemis elisa) male, Chambers County.jpg|Calico pennant (
Celithemis elisa) male, Chambers County File:5. Roseate Skimmer (Orthemis ferruginea), male, Liberty County.jpg|Roseate skimmer (
Orthemis ferruginea), male, Liberty County File:6. Widow skimmer (Libellula luctuosa), female, Houston County.jpg|Widow skimmer (
Libellula luctuosa), female, Houston County File:Sarracenia spiketail (Cordulegaster sarracenia) Rapides Parish, LA, USA (7 April 2019) 2.jpg|Sarracenia spiketail (
Cordulegaster sarracenia) Rapides Parish, Louisiana == History ==