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Location Canada, Ontario
Central coordinates 87o 36.61' West  56o 5.97' North
IBA criteria A4iii
Area 62,500 ha
Altitude 0 - 5m
Year of IBA assessment 2008

Bird Studies Canada/Nature Canada

Site description The Severn River enters Hudson Bay about 200 km east of the Manitoba border. Fort Severn is located about 10 km upstream. The IBA includes the Severn River estuary; the coastline to the east for about 20 km to Beavertrap Creek; and the coastline to the west for about 25 km to Blackcurrent River. Supertidal marshes extend inland for 5 to 10 km, with some heath lichen tundra on low beach ridges. Partridge Island, a large marshy area, is located in the middle of the river mouth. Intertidal marshes, mudflats and submerged shoals extend offshore for at least a couple of kilometres. Numerous pools and ponds dot the supertidal marshes. This site lies within the tundra zone, and is in an area of permafrost with a mean daily temperature of - 5°C.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
A4iii Species group - waterbirds passage  1995  20,000-49,999 individuals  unknown  A4iii   


IUCN habitat Habitat detail Extent (% of site)
Shrubland Scrub  -
Grassland Tundra  -
Wetlands (inland) Bogs; 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

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Severn River Coastline. Downloaded from on 20/10/2014

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