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Important Bird and Birding Areas
Open Waters of Delaware Bay

IBBA Site Guide

122
County
Coordinates: N 39.12064
W 75.02285
Site Map
Delaware Bay: New England / Mid-Atlantic Coast

Area: 67,012 Acres     

Habitat: Shallow open water

Site Description: This site includes the shallow marine waters of Delaware Bay and the associated shoals between Cape May Point and the Maurice River. Though these waters are essentially vacant of birdlife in summer and early fall, hundreds of thousands of birds utilize this area throughout the winter and as spring staging grounds before beginning their journey to northern breeding grounds. Large concentrations of diving ducks typically gather west of East Point and in the Maurice River Cove areas.

IBA Criteria:
CriterionSpecies
Significant Congregations (W, SM)Waterfowl
Significant Congregations - Exceptional Single Species Concentration (SM)Black Scoter, Red-throated Loon, Surf Scoter
Surf Scoters and Black Scoter
Surf Scoters and Black ScoterKevin Watson
 
Birds: The shallow waters of the Delaware Bay host significant numbers of waterfowl during the winter and spring migration seasons. Wintering waterfowl species include Common Goldeneyes and Red-breasted Mergansers. The area provides an important spring staging area for an exceptional concentrations of Northern Gannet and over 250,000 Black and Surf Scoters. Occasionally, thousands of Greater and Lesser Scaup gather near the mouths of the Delaware Bay’s major river drainages in late winter.

Conservation: The primary threats to the open waters of Delaware Bay are disturbance and activities that result in degraded water quality that can impact waterfowl food sources. These threats include oil spills and recreational boating and fishing. Heavy recreational boat traffic throughout the bay increases disturbance to birds, degrades water quality and may be depleting the area of its healthy fish populations. Runoff and sewage inputs from dense coastal development are regular occurrences that also degrade water quality. Additionally, oil spills affect this region as it contains the nation’s third largest petrochemical port. The Delaware Bay and River is also the largest oil transfer port on the East Coast. Industrial land use, including chemical industries, in the Delaware River and upper estuary may also impact these waters. Various organizations and government agencies have partnered to develop emergency response programs in the event of an oil spill. Tri-State Bird Rescue & Research, Inc., for example, trains and deploys hundreds of volunteers to handle birds affected by oil spills. NJ Audubon Society staff is among those trained to respond in an emergency situation.

Additional Information: Site Report