Wildlife on the Brink: Wood Stork

SCIENTIFIC NAME: Mycteria americana

STATUS: Endangered

HABITAT: Shallow marshes and coastal wetlands, such as tidal flats and pools

LIFE HISTORY: Forms large colonies to nest and feed, historically numbering several thousand. Favors nesting sites in cypress swamp trees and on mangrove islands. Fluctuating water levels concentrate prey in pools, aiding in feeding.

THREATS: Habitat loss due to hydro-management and other development

FORMER RANGE: Entire southeastern U.S. and parts of Texas

CURRENT POPULATION: 11,000

Wood storks feed by sense of touch in shallow, muddy waters, patiently sweeping their bills from side to side underwater as they amble through the wetlands. Their jaws snap shut within 25 milliseconds of sensing prey—one of the quickest reflexes in the vertebrate world.

In the mid-20th century, as many as 15,000 breeding pairs formed massive colonies in south Florida's wetlands. Today, almost all these birds have left south Florida, and their overall population has dropped by more than half, due to water manipulation and habitat destruction.

The Army Corps of Engineers recently decided to allow 5,000 acres of limestone mining in the Everglades, which would further disrupt historic wood stork habitat. NRDC is using the Endangered Species Act to challenge that decision in court, while our citizen-activist BioGems Defenders are pressuring the Bush administration to halt the Everglades limestone mining project.

Photo: wood stork © Ryan Hagerty, USFWS