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Gulf Prairies Ecoregion
Wildlife Management Plan for Calhoun County, Texas
Calhoun County spans the boundary between the East Central Texas Plains and Western Gulf Coastal Plain, supporting 128 documented wildlife species across 8 taxonomic groups.
Intelligence Snapshot
Regulatory Complexity
Calhoun County has elevated conservation considerations that affect wildlife management planning. The 10 federally listed species documented here mean that brush management, water development, and habitat modification must be designed with ESA compliance in mind. A properly calibrated plan accounts for these constraints. A generic plan does not.
Calhoun County Ecological Profile
TPWD's Welder Flats WMA provides Calhoun County with a working demonstration of Gulf Prairies management practices across 507 square miles of coastal grasslands, marshes, and tidal flats. The coastal prairie, once one of the most extensive grassland ecosystems in North America, has been reduced to scattered remnants by rice farming, cattle ranching, and industrial development. Powderhorn State Park provides a nucleus of protected habitat and a reference landscape for private land management in the surrounding area.
Wildlife management on the Gulf Prairies emphasizes wetland management, coastal prairie restoration, and moist soil management for waterfowl and shorebirds. Properties with access to water control structures can manage shallow impoundments on seasonal schedules: drawing down in spring to stimulate smartweed, barnyard grass, and other moist soil plants, then reflooding in autumn to create feeding habitat for migrating waterfowl. Upland prairie management focuses on prescribed fire at 2 to 3 year intervals to control Chinese tallow, McCartney rose, and other invasive woody species while stimulating gulf muhly, little bluestem, and brownseed paspalum. Grazing management using short-duration, high-intensity rotational systems can mimic the disturbance patterns of historic bison herds and maintain the structural diversity that grassland birds require.
Transitional Ecoregion
Calhoun County spans the boundary between the East Central Texas Plains and Western Gulf Coastal Plain. Species assemblages, soil types, and appropriate management intensities differ between these regions. A property in the East Central Texas Plains portion of the county will require different practices than one in the Western Gulf Coastal Plain zone.
Soil Conditions
Soils are heavy, poorly drained clays of the Lake Charles, Beaumont, and Edna series, underlain by a shallow water table that creates the seasonal wetland conditions critical for waterfowl and shorebird habitat.
Fire Ecology
Coastal prairie evolved with fire at 1 to 3 year intervals. Prescribed burning is the primary tool for controlling Chinese tallow invasion and maintaining the native grass and forb communities that support Attwater's prairie chicken and other grassland obligate species.
Spans 2 ecoregions: East Central Texas Plains, Western Gulf Coastal Plain
This region is the last stronghold of the Attwater's prairie chicken, one of the most endangered birds in North America, with fewer than 200 individuals surviving in the wild. Mottled duck, a non-migratory species endemic to the Gulf Coast, depends on the mosaic of coastal prairie and freshwater wetlands for nesting and brood-rearing. Wintering waterfowl concentrations in the rice prairies and managed wetlands can exceed a million birds, including pintail, teal, and white-fronted geese. Whooping crane, the tallest North American bird and a federally endangered species, winters at Aransas National Wildlife Refuge and feeds in the surrounding marshes and grain fields.
Calhoun County Species of Conservation Concern
Calhoun County supports 128 documented species. Mammals account for the largest share at 32 species, followed by Birds at 31. The 10 federally listed and 40 state-protected species documented here represent meaningful regulatory considerations for any land management activity. Federally listed species include northern aplomado falcon, whooping crane, and Kemp's Ridley sea turtle. Northern aplomado falcon: Requires open grassland with scattered yucca or shrub for nesting in South Texas.
Primary Management Targets
mottled duck, whooping crane, reddish egret
Listed Species
Requires open grassland with scattered yucca or shrub for nesting in South Texas. Brush encroachment control and grassland restoration benefit this species. Reintroduction efforts are active along the lower Texas coast.
Winters along the Texas coast at Aransas NWR and surrounding marshes. Grain field management and wetland water levels in coastal counties affect foraging habitat. Disturbance within 1,000 feet of roosting sites is regulated.
Nests on Gulf Coast beaches, primarily in the western Gulf. Coastal property lighting must be managed to avoid disorienting hatchlings. Beach driving restrictions apply during nesting season (April through July).
Nests rarely on Texas beaches. Deep-water forager. Coastal lighting management and beach protection during nesting season apply.
Inhabits dense emergent marsh vegetation. Extremely secretive and declining. Wetland drainage, mowing of marsh vegetation during nesting season, and altered hydrology are primary threats. Marsh management must maintain dense low vegetation.
Nests on bare sand and shell flats along the Gulf Coast. Coastal properties must avoid disturbance to nesting areas during breeding season (March through August). Vehicle traffic on beaches in occupied habitat is restricted.
Migrates through Texas coastal beaches in spring and fall. Depends on horseshoe crab eggs and invertebrates on tidal flats. Beach disturbance during migration windows (April through May, September through November) should be minimized.
Western distinct population segment is threatened. Requires large patches of mature riparian woodland (cottonwood, willow) with dense understory. Clearing riparian corridors wider than 300 feet may trigger consultation in designated critical habitat.
Inhabits coastal waters and seagrass beds. Coastal lighting management and beach protection during nesting season apply. Dredging in seagrass habitat is regulated.
Nests on Gulf Coast beaches. Coastal properties must manage artificial lighting to avoid disorienting nesting females and hatchlings. Dredging and beach nourishment projects require seasonal restrictions.
Inhabits dense emergent marsh vegetation. Extremely secretive and declining. Wetland drainage, mowing of marsh vegetation during nesting season, and altered hydrology are primary threats. Marsh management must maintain dense low vegetation.
Requires open grassland with scattered yucca or shrub for nesting in South Texas. Brush encroachment control and grassland restoration benefit this species. Reintroduction efforts are active along the lower Texas coast.
Nests on bare sand and shell flats along the Gulf Coast. Coastal properties must avoid disturbance to nesting areas during breeding season (March through August). Vehicle traffic on beaches in occupied habitat is restricted.
Migrates through Texas coastal beaches in spring and fall. Depends on horseshoe crab eggs and invertebrates on tidal flats. Beach disturbance during migration windows (April through May, September through November) should be minimized.
Winters along the Texas coast at Aransas NWR and surrounding marshes. Grain field management and wetland water levels in coastal counties affect foraging habitat. Disturbance within 1,000 feet of roosting sites is regulated.
Found in offshore Gulf waters. No direct land management implication for Texas properties.
Occasional presence in Gulf of Mexico waters. No direct land management implication. Ship strike reduction measures apply to offshore vessel traffic.
Resident in the Gulf of Mexico. No direct land management implication. Offshore energy development and vessel traffic are primary regulatory concerns.
Occasional visitor to coastal Texas waters. No direct land management implication for most properties. Coastal construction projects near warm water discharges may require manatee monitoring.
Rare in Gulf of Mexico. No direct land management implication for Texas properties.
Occurs in Gulf of Mexico. No direct land management implication for Texas properties.
Rare in Gulf of Mexico. No direct land management implication for Texas properties.
Present in deep Gulf waters. No direct land management implication for Texas properties.
Rare in Texas waters. Inhabits coral reefs and hard-bottom habitats. No direct land management implication for most properties. Coastal lighting management benefits all sea turtle species.
Nests on Gulf Coast beaches, primarily in the western Gulf. Coastal property lighting must be managed to avoid disorienting hatchlings. Beach driving restrictions apply during nesting season (April through July).
Depends on harvester ant colonies for food. Fire ant suppression and native grassland restoration directly benefit this species. Listed as state threatened.
Inhabits coastal waters and seagrass beds. Coastal lighting management and beach protection during nesting season apply. Dredging in seagrass habitat is regulated.
Nests rarely on Texas beaches. Deep-water forager. Coastal lighting management and beach protection during nesting season apply.
Nests on Gulf Coast beaches. Coastal properties must manage artificial lighting to avoid disorienting nesting females and hatchlings. Dredging and beach nourishment projects require seasonal restrictions.
Source: Texas Parks & Wildlife Department RTEST Database; U.S. Fish & Wildlife Service Critical Habitat Designations
Gulf Prairies Wildlife Management Standards
Management in Calhoun County is driven by water. Seasonal wetland drawdown and reflooding schedules, Chinese tallow control, and coastal prairie fire are the primary management activities. Under 34 TAC Section 9.2002, the Gulf Prairies ecoregion requires 15 to 20 minimum acres, 10% brush management coverage, and semi-annual wildlife census documentation. Primary targets are mottled duck, whooping crane, and reddish egret. Wetland water level management and coastal prairie fire are the dominant management tools.
These are the intensity thresholds your plan must meet for the Gulf Prairies ecoregion. Your county appraisal district will verify compliance against these minimums. A plan that does not address them risks denial of your wildlife management valuation. For a complete overview of the seven management pillars, see the management pillars guide.
This is a hard minimum. The appraisal district will verify that your plan prescribes brush management on at least this proportion of your acreage annually.
Food plots must provide nutritional supplementation for target species. The minimum size and density are set by ecoregion to reflect carrying capacity.
Feeder placement and protein content are auditable. The aflatoxin threshold (20 ppb) is a compliance requirement, not a suggestion.
Fire ant suppression directly supports native harvester ant populations, the primary food source for Texas horned lizard and other ground-foraging species.
Brown-headed cowbirds are brood parasites that reduce nesting success of songbirds. The minimum applies to properties where cowbird trapping is selected as a management activity.
The burn rotation percentage applies over the full plan period. Properties that cannot burn due to WUI constraints must document the limitation and substitute equivalent mechanical treatment.
Nest box density is based on territory size of target cavity-nesting species. Boxes must be monitored and maintained annually.
Source: TPWD 34 TAC Section 9.2002, Comprehensive Wildlife Management Planning Guidelines
Water Resources
6 Groundwater Conservation Districts regulate water resources in Calhoun County, creating a dense permitting landscape for new wells and production limits that directly affect wildlife management water sources.
Conservation Infrastructure
Powderhorn State Park provides protected Gulf Prairies habitat and serves as a reference landscape for private land management in the county. TPWD manages Welder Flats WMA and Powderhorn WMA in the county, where land managers can observe demonstrated management practices applicable to their own properties.
Infrastructure
The Railroad Commission documents 4,999 wells and 1,439 pipeline segments in Calhoun County, a moderate industrial presence alongside agricultural land use. 58 orphan wells are on the Railroad Commission's plugging priority list.
The Central Flyway crosses Calhoun County's 507 square miles every year, carrying millions of migratory birds. The management plan accounts for that or it does not.
Build your Calhoun County wildlife management plan.
2 ecoregions. 128 documented species. Calhoun County's ecological complexity means the plan has to be specific to your property's landscape position. Calibrated to Gulf Prairies standards.
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