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Important Bird and Birding Areas
Mouth of Delaware Bay

IBBA Site Guide

123
Cape May County
Coordinates: N 38.9021
W 75.06183
Site Map
Delaware Bay: New England / Mid-Atlantic Coast

Area: 16,631 Acres     

Habitat: Shallow open waters and associated shoals at the mouth of the Delaware Bay

Site Description: This site includes the shallow waters at the mouth of the Delaware Bay located between the southwestern tip of Cape May Point, NJ and Delaware. The IBA encompasses Prissywick Shoal, Eph Shoal, Middle Shoal, Overfalls Shoal, Somers Shoal and the unnamed rips closer to Cape May Point. These waters and shoals provide extremely valuable foraging and staging habitat for water birds year-round.

IBA Criteria:
CriterionSpecies
Significant Congregations (B)Gulls & Terns
Significant Congregations - Exceptional Single Species Concentration (SM)Black Scoter, Red-throated Loon, Surf Scoter
Red-throated Loon
Red-throated LoonSteve Byland
 
Birds: Throughout spring, summer and fall, these open shallow waters serve as a major foraging area for thousands of gulls and terns as schools of fish occupy the waters near shoals year-round. It is also important in winter for feeding gulls and Northern Gannets. Common Terns are prevalent from May to September; Forster's Terns from mid-March to November and Royal Terns from August to October. Bonaparte's Gulls also use the site in the winter although their numbers fluctuate widely. In spring, it is an essential staging area for many species. From about February to April, up to 185,000 Black and Surf Scoters, and 3000 Red-throated Loons, gather here in anticipation of their journey north. Common sightings of pelagic birds include Wilson's Storm-Petrels in June and July, and Parasitic Jaegers in October.

Conservation: As the entrance to a major shipping channel, the mouth of the Delaware Bay experiences considerable boat traffic and is subject to frequent oil spills. Recreational fishing and boating activities create additional water pollution and may be depleting the area of its healthy fish populations.

Additional Information: Site Report