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Location Canada, Québec
Central coordinates 70o 51.64' West  46o 53.21' North
IBA criteria A4iii
Area 1,400 ha
Altitude 0 - 6m
Year of IBA assessment 2008

Bird Studies Canada/Nature Canada

Site description Anse de Saint-Vallier is a small bay on the south shore of the St. Lawrence River by the village of St. Vallier, Québec. It consists primarily of a mudflat and a Scirpus marsh; the area’s boundaries are delineated by the high and low tide levels. The Boyer River, which flows into the bay, is a spawning site for three species of fish at risk.

Key Biodiversity Anse de Saint-Vallier is noteworthy for its flocks of migrating waterfowl. The most prominent of these is the Greater Snow Goose (subspecies atlanticus), which can be present in globally significant numbers in the spring. In 1995, a flock of 50,000 were spotted, accounting for over 1% of the global population of this subspecies.

Numerous other waterfowl species, including Canada Goose, are common at the site, especially in fall when hunting pressures elsewhere bring them here for shelter. At this time, surveys have recorded both species of scaup, with maximum counts of 2,510 for Greater (1975) and 4,000 for Lesser (1988).

This site also hosts flocks of migrant shorebirds in spring and fall. The most common species are Killdeer, Black-bellied Plover, Spotted Sandpiper, Greater and Lesser yellowlegs, and White-rumped, Least and Semipalmated sandpiper. The highest numbers are found in early August. For instance, in August 1989, a peak of 4,000 Semipalmated Sandpiper were recorded.

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)  
Anse de Saint-Vallier Faunal Habitat 321 protected area contained by site 330  
Anse Mercier Faunal Habitat 135 protected area contained by site 140  
Pointe Samson Faunal Habitat 96 protected area overlaps with site 93  
Saint - Vallier (est) Faunal Habitat 160 protected area contained by site 160  
Saint-Vallier Migratory Bird Sanctuary 405 protected area contained by site 400  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Intertidal mud, sand or salt flats; Salt/brackish marshes  -
Coastline Rocky flats & barrens  -

Land use

Land-use Extent (% of site)
nature conservation and research major

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Saint-Vallier. Downloaded from on 23/10/2016

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