Anahuac NWR

Ecology & Conservation

Anuhuac NWR was named a WHSRN Site of International Importance because of the high numbers of Whimbrels (Numenius phaeopus) that use it each April and May (> 2,200). These are presumed to be mostly or entirely of the N. p. hudsonicus subspecies and therefore >10% of the estimated biogeographic population of 18,000 for that subspecies.

Anahuac NWR is also a very important spring stopover site for other species, especially Lesser Yellowlegs, Pectoral Sandpiper, and possibly both the Long- and Short-billed Dowitcher. If daily turnover rates are taken into account, the number of each of those species that use the refuge during the course of a spring migration likely exceeds the 10% “flyway” threshold as well.

The full list of species reported (followed by count and date) is:

American Golden-Plover, 19, 5/13/99
Black-bellied Plover, 72, 5/2/99
Wilson’s Plover, 2, 4/10/99
Semipalmated Plover, 98, 4/19/99
Killdeer, 151, 4/10/99
Black-necked Stilt, 658, 4/10/99
American Avocet, 106, 5/2/99
Greater Yellowlegs, 365, 4/19/99
Lesser Yellowlegs, 2512, 4/19/99
Yellowlegs, unidentified, 383, 5/13/99
Solitary Sandpiper, 21, 4/19/99
Willet, 244, 4/19/99
Spotted Sandpiper, 59, 3/30/99
Upland Sandpiper, 13, 4/19/99
Whimbrel, 2233, 4/22/05; Observers: Whitbeck & Walther
Whimbrel, 2922, 5/03/04; Observers: K McDowell
Whimbrel, 2420, 5/13/99; Observers: K McDowell & Whitbeck
Long-billed Curlew, 22, 4/10/99
Hudsonian Godwit, 10, 5/13/99
Marbled Godwit, 5, 5/2/99
Ruddy Turnstone, 62, 5/13/99
Sanderling, 44, 4/10/99
Semipalmated Sandpiper, 396, 4/10/99
Western Sandpiper, 1934, 4/10/99
Least Sandpiper, 564, 4/19/99
White-rumped Sandpiper, 9, 5/2/99
Baird’s Sandpiper, 21, 5/2/99
Pectoral Sandpiper, 2451, 5/13/99
Dunlin, 1780, 4/10/99
Stilt Sandpiper, 925, 5/13/99
Buff-breasted Sandpiper, 210, 4/10/99
Short-billed Dowitcher, 140, 4/10/99
Long-billed Dowitcher, 2000, 3/30/99
Dowitcher, unidentified, 7073, 3/30/99
Wilson’s Snipe, 319, 2/25/99
Wilson’s Phalarope, 458, 5/2/99

TOTAL 25,546 (Sum of max counts during 1999 surveys)

Land Use:
Anahuac NWR is a federally-owned National Wildlife Refuge, a unit of the National Wildlife Refuge System, administered by the U.S. Fish and Wildlife Service, Department of Interior.

Protection:
The entire site is protected as a National Wildlife Refuge.

Current Threats:
Most threats to the area are related to: 1) loss of coastal and inland wetlands through subsidence and sea level rise, shoreline/coastal erosion, and saltwater intrusion; and 2) prevalence and spread of non-native plant and animal species in wetlands, uplands, and coastal woodlots.

Development and land-use changes on a landscape level will affect the wildlife value of the area. Many shorebirds use a complex of rice, moist-soil, and natural wetlands on and off the refuge on a daily basis.

The current decline in rice farming is a major threat to shorebirds in the area. Rice farming provides important shorebird habitat, particularly during the spring. As rice declines in the area, the overall use of the refuge and the shorebird value of the upper Texas coast will decline.

Major Causes of Disturbance:
The area is managed to minimize disturbances. Potential sources of disturbance include oil & gas activities, aviation, recreation, and research and management activities.    

Research and Management Activities:
Anahuac NWR is managed to conserve, enhance, and restore the region’s coastal wetlands, woodlots, and prairies. The goals of management activities are to provide wintering, migrational, and nesting/brood-rearing habitat for waterfowl, shorebirds, marsh and wading birds, other wetland-dependent wildlife as well as resident and migratory land birds.