Lennox Foundation Southmost Preserve

Southmost Preserve is located on a meandering bend of the Rio Grande at the southernmost part of Texas. As part of the Boscaje de la Palma region of the Lower Rio Grande Valley Wildlife Corridor, the 1,034-acre preserve encompasses one of the last stands of native sabal palm trees in the country. This land has been called the "Jewel of the Rio Grande Valley" and many would argue that Southmost Preserve is one of the most ecologically important pieces of land remaining in the Valley.

This preserve is home to one of the only two remaining large stands of native Mexican sabal palms in the U.S. In addition, several large tracts of Tamaulipan thornscrub are found here. A number of species at the northernmost extent of their range are present, such as David's milkberry, potato tree, Palmer's bloodleaf, and climbing plumbago. The bright fuchsia floral spikes of coral bean trees and the scarlet flowers of Turk's cap are abundant in spring beneath the canopy of palms and tall riparian trees.

The Southmost Preserve is part of major migratory flyways. Birds that may be observed here include the Altamira oriole, chachalaca, green jay, tropical parula, buff-bellied hummingbird, black-bellied and fulvous whistling duck, groove-billed ani, Couch's kingbird, and olive sparrow. The wooded fringes of the resacas offer some of the last remaining nesting habitat known for two rare subspecies of birds, the Brownsville common yellowthroat and the Lomita Carolina wren.

The natural vegetative communities of Southmost Preserve provide habitat for a number of rare, threatened or endangered species, including the Southern yellow bat, Texas tortoise and Coue's rice rat. The speckled racer, a rare snake, has been sighted on the preserve, as has the black-spotted newt. Ocelot and jaguarundi have been reported on occasion in this area. Rare amphibians, such as the sheep frog, Mexican white-lipped frog and Rio Grande lesser siren, are dependent upon this aquatic habitat.

Because of the its unique flora and fauna and rich biological diversity, the property has long attracted the attention of conservation biologists. Despite the land's history of agricultural use, the preserve's sabal palm forest, resacas and Tamaulipan thornscrub are, remarkably, among the largest and highest-quality examples of these native communities in the region.

The property's former owner, Julia Jitkoff, used the tract for a variety of agricultural enterprises, including citrus production, row crop farming and a nursery palm operation. She also made a concerted effort to protect some of the property's unique natural areas. In 1999, The Nature Conservancy of Texas acquired the property from Ms. Jitkoff. The Conservancy continues to farm a portion of the land, as well as to actively restore native areas.

Site management is focused on ecological research, native brush and resaca restoration, and removal of exotic species. Community-based conservation and outreach also are priorities. The site has good potential for long-term research on the compatibility of agricultural activities within a protected conservation area.

Occasional volunteer work days and public events are conducted at the site. Contact the preserve office concerning opportunities.

Visitation to preserve by appointment only, please. Please contact Max Pons for more information, (956) 546-0547; cell: (956) 459-6121; email: mpons@tnc.org.

Download Fact Sheet
Lower Rio Grande Valley


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The preserve is located in Cameron County, southeast of Brownsville on the Rio Grande.


Matt and Riley

Roving reporters Matt and Riley explore the Southmost Preserve. Watch their video diary!

Southmost Preserve

See a video on the Southmost Preserve Threatened Treasures.


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