IBA Kaskattama River Mouth
Hudson Bay Coast, Manitoba
Site Summary
MB006 Latitude
57.097° N
90.218° W
0 - 5 m
672.93 km²
coniferous forest (boreal/alpine), tundra, rivers/streams, tidal rivers/estuaries, mud or sand flats (saline), open sea, inlets/coastal features (marine)
Land Use:
Nature conservation and research, Hunting, Tourism/recreation
Potential or ongoing Threats:
IBA Criteria: Globally Significant: Congregatory Species, Waterfowl Concentrations, Continentally Significant: Congregatory Species
Conservation status: Wildlife Management Area
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Site Description
The Kaskattama River Mouth is located on the Hudson Bay Coast, about 75 km west of the Ontario border. The closest community within Manitoba is Gillam, which is located about 290 km southwest of the site. The coast is a narrow sandy beach, bordered by gentle sand dunes. There are no rock outcroppings along this section of the coast. Tundra borders the coastline, gradually grading into taiga then boreal-coniferous forest. The river branches a number of times at its mouth creating numerous islands and extensive sandbars. Since the terrain is flat, the tidal action from Hudson Bay creates large areas of mud flats and supertidal salt marshes.
Due to its isolated location, few detailed surveys have been completed at this site, and none have documented the full magnitude of bird usage. In the fall of 1997, peak one-day counts included over 50,000 Snow Geese; more than 10,000 Cackling Geese; and more than 700 Hudsonian Godwits. Considering the probability of high turnover rates, it is likely that the numbers of these species using this site during the entire season is much larger.

Other species with notable one-day counts during fall migration include Red Knot (100+) and Lesser Yellowlegs (250+). Over one thousands shorebirds were noted by Environment and Climate Change Canada in spring 2014. Nesting species include Least Sandpipers (50+), Semipalmated Plovers (20+) and Willow Ptarmigan (50+) among many others. In 1997, nesting Barn Swallows were also recorded. This is of ornithological interest since it is a range extension of at least 250 km to the northeast of this species' normal breeding range.

IBA Criteria
SpeciesT | A | I Links Date Season Number G C N
Cackling Goose 1997 FA 10,000
Hudsonian Godwit 1997 FA 700
Note: species shown in bold indicate that the maximum number exceeds at least one of the IBA thresholds (sub-regional, regional or global). The site may still not qualify for that level of IBA if the maximum number reflects an exceptional or historical occurrence.
Conservation Issues
The northerly location and isolated nature of this site results in the presence of few direct threats.

The IBA Program is an international conservation initiative coordinated by BirdLife International. The Canadian co-partners for the IBA Program are Birds Canada and Nature Canada.
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