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Location Canada, Ontario
Central coordinates 80o 4.19' West  44o 57.06' North
IBA criteria A4i, A4iii
Area 18 ha
Altitude 176 m
Year of IBA assessment 2008

Bird Studies Canada/Nature Canada

Site description The Watchers are located on the Great Lakes in the southeastern corner of Georgian Bay, Lake Huron. They consist of two islands, North and South Watcher, which are located at the mouth of Severn Sound, about five to seven km northwest of Giants Tomb Island. South Watcher is a small, slightly elevated cobblestone shoal with very limited shrubby vegetation. North Watcher is comprised of a low-lying limestone outcrop with several tall trees, and a well-developed shrub understory. Cormorants have killed most of the limited vegetation on South Watcher Island.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Caspian Tern Hydroprogne caspia breeding  1998  571 nests  A4i  Least Concern 
A4iii Species group - waterbirds breeding  1989  9,524 breeding pairs  unknown  A4iii   


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Freshwater lakes and pools  -
Coastline Cliffs, rocky shores, islets, freshwater  -

Land use

Land-use Extent (% of site)
nature conservation and research major
not utilised major

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: The Watchers. Downloaded from on 23/10/2014

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