|Location||Canada, Nova Scotia|
|Central coordinates||64o 18.57' West 45o 9.06' North|
|IBA criteria||A4i, A4iii|
|Altitude||0 - 15m|
|Year of IBA assessment||2008|
Site description The Southern Bight of the Minas Basin, which includes the Avon River situated about 12 km north of Wolfville, is a large embayment in the Minas Basin, Bay of Fundy, south of the boundary line between Medford and Bramber. The Southern Bight is a large tidal embayment, chiefly composed of intertidal mudflats that are divided by river channels into five sections, varying in substrate (sand/silt gradients) and invertebrate fauna. These five sections include Kingsport-Medford, Porters Point, Starrs Point, Evangeline Beach, and Avonport.
Key Biodiversity The mud flats at the head of the Bay of Fundy are important staging grounds for an estimated 1 to 2 million shorebirds in late July and early August (in this and other adjacent IBAs). At low tide, vast areas of mud and sand flats, and salt marshes are exposed - the result of the Bay of Fundys tides, which are the highest tides in the world (up to 16 m). The rich red-brown mud harbors millions of Fundy mud shrimp, a vital food source for the Semipalmated Sandpiper. The Southern Bight, Minas Basin and other regions in the Bay of Fundy are the last and most important stopovers for the sandpipers, where they build up fat stores enabling them to make the long southward migration to South America in three to four days. The availability of such a prodigious food supply attracts 50 to 95% of the worlds Semipalmated Sandpipers, along with many other species of shorebirds, to the Bay of Fundy.
Some of these birds are found in the Southern Bight, Minas Basin: 51,667 Semipalmated Sandpipers have been recorded in late July and early August. This figure accounts for 1.4% of the global population. Also, more than 1% of the North American Black-bellied Plover population has been observed at this site. This number is based on data from 1974 to 1983 using an improved estimation method that was reported in Canadian Field Naturalist in 1993.
A high diversity of other migrant shorebirds forage on the large intertidal mud and sand flats throughout the Bight. Commonly observed species include: Red Knot, Sanderling, Short-billed Dowitcher, Least Sandpiper, and Semipalmated Plover. Some of these species may at times occur in numbers exceeding 1% of their North American or global populations, but surveys often do not cover all parts of the basin. Likewise, it is believed that an accurate census of the entire basin would reveal greater than 100,00 shorebirds.
During the spring tides, some of the sandpipers use nearby dyked fields for roosting.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Grey Plover Pluvialis squatarola||passage||1994||2,130 individuals||-||A4i||Least Concern|
|Short-billed Dowitcher Limnodromus griseus||passage||1994||1,613 individuals||-||A4i||Least Concern|
|Semipalmated Sandpiper Calidris pusilla||passage||1994||51,667 individuals||-||A4i||Near Threatened|
|A4iii Species group - waterbirds||non-breeding||1985||50,000-99,999 individuals||unknown||A4iii|
|Protected area||Designation||Area (ha)||Relationship with IBA||Overlap with IBA (ha)|
|Boot Island||National Wildlife Area||144||protected area contained by site||150|
|Fort Edward||National Historic Site||15||protected area contained by site||16|
|Minas Basin||Wildlife Management Area||186||protected area contained by site||130|
|New England Planters||National Historic Site||0||protected area contained by site||1|
|Southern Bight-Minas Basin||Wetlands of International Importance (Ramsar)||26,800||protected area overlaps with site||8,700|
|Southern Bight-Minas Basin||Wildlife Management Area||26,800||protected area overlaps with site||8,700|
|Wolfville||Eastern Habitat Joint Venture Lands||0||protected area contained by site||0|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Wetlands (inland)||Estuarine waters; Intertidal mud, sand or salt flats; Salt/brackish marshes||60%|
|Artificial - terrestrial||Arable land; Improved pasture land||20%|
|Land-use||Extent (% of site)|
|nature conservation and research||minor|
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Recommended citation BirdLife International (2015) Important Bird and Biodiversity Area factsheet: Southern Bight, Minas Basin. Downloaded from http://www.birdlife.org on 29/11/2015
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