email a friend
printable version
Location Canada, Ontario
Central coordinates 83o 40.20' West  55o 16.27' North
IBA criteria A4iii
Area 98,000 ha
Altitude 0 - 10m
Year of IBA assessment 2008

Bird Studies Canada/Nature Canada

Site description The Sutton River enters Hudson Bay in northeastern Ontario, about 90 km west of Cape Henrietta Maria. The IBA includes the bay at the mouth of the Sutton and Kinushseo Rivers, Little Cape, and the coastline eastward for about 40 km. Little Cape is a promontory that extends about 5 km into Hudson Bay on the north and east side of the Sutton River estuary. About one third of the cape consists of dry gravel ridges up to 9 m high, which are covered with low vegetation (grass and moss); the remainder is low, flat marshland. The Sutton and Kinushseo River estuaries are shallow and shoal filled. The areas adjacent to the river mouths and to the east consist of low marshy fens and dry heath lichen tundra on low beach ridges. Marshes and fens extend inland for 10 to 15 km through open tundra. The shoreline has wide intertidal marshes and submerged shoals extending for at least 1 km offshore.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
A4iii Species group - waterbirds non-breeding  20,000-49,999 individuals  unknown  A4iii   

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Polar Bear Provincial Park 2,355,200 protected area overlaps with site 34,000  
Polar Bear Provincial Park Wetlands of International Importance (Ramsar) 2,408,700 protected area overlaps with site 31,000  


IUCN habitat Habitat detail Extent (% of site)
Grassland Tundra  -
Wetlands (inland) Estuarine waters; Fens transition mires & springs; Freshwater marshes/swamps; Intertidal mud, sand or salt flats; Salt/brackish marshes  -
Sea Open sea  -

Land use

Land-use Extent (% of site)
hunting major

Contribute  Please click here to help BirdLife conserve the world's birds - your data for this IBA and others are vital for helping protect the environment.

Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Sutton River Coastline. Downloaded from on 22/08/2014

To provide new information to update this factsheet or to correct any errors, please email BirdLife