Bitter Lake National Wildlife Refuge - Aquatic Habitats

Aquatic Habitats

Bitter Lake includes various unique aquatic habitats. The Pecos River flows across the refuge and forms oxbow lakes. Additionally, the Roswell aquifer underlies the area. Erosion of gypsum by this underground water has caused many sinkholes, some of which have become very deep lakes that are home to unique species. Underground water also feeds springs that are the source of water for the lakes on the refuge. The water level in these lakes is managed by park personnel and is adjusted throughout the year to accommodate the different species of birds that migrate to the refuge.