One of the only remaining naturally occurring islands in the Lower Laguna Madre, Green island harbors a lush Tamaulipan thornscrub plant community, which provides excellent nesting habitat for one of the largest Reddish Egret colonies in the world. In addition, multiple other waterbird species nest at the site, making it critically important for the conservation of many species of wading birds in the Lower Laguna.

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Ornithological Summary

Green Island has one of the largest aggregations of breeding Reddish Egrets and Roseate Spoonbills in the world. In addition, it is the primary colony in the Lower Laguna Madre for both species and an important breeding habitat for numerous other wading bird species in the Lower Laguna.

Conservation Issues

Fireants destroy eggs and hatchlings. Mammalian predators destroy nests and cause colony abandonment. Grackles destroy eggs.
Habitat degradation due to invasive grasses which shade out germinating shrubs.
Disturbance to birds by people getting on the island and disturbing nesting birds.


Green Island is owned by the State of Texas and leased by Audubon Texas to manage habitat for colonial waterbirds.


Lomas natural island with native Tamaulipan thornscrub.

Land Use

Managed actively for the conservation of colonial wading birds and research activities related to their ecology and conservation.

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