IBA Duke of Edinburgh ER Bird Islands

Posted January 29, 2012 | Categories : 120,Research,Species List |

From :

IBA Duke of Edinburgh Ecological Reserve
Port Hardy, British Columbia
Site Summary
BC007 Latitude
50.987° N
127.68° W
0 – 85 m
99.28 km²
coniferous forest (temperate), coastal cliffs/rocky shores (marine)
Land Use:
Not Utilized (Natural Area)
Potential or ongoing Threats:
Disturbance, Oil slicks
IBA Criteria: Globally Significant: Congregatory Species, Colonial Waterbirds/Seabird Concentrations, Nationally Significant: Congregatory Species
Conservation status: Ecological Reserve (provincial)

Printable map

Seasonal abundance

Annual frequency

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Site Description

The Duke of Edinburgh Ecological Reserve is located at the western end of Queen Charlotte Strait, midway between the coast of British Columbia and the northern tip of Vancouver island. It is comprised of six islands grouped into three clusters: Storm Islands, Reid Islets, and Naid Islets are the most northerly and outermost islands; the Buckle Group lie farthest to the southeast; and Pine Island and Tree Islets are located in between.The larger islands have a forest cover of western hemlock, western red cedar and sitka spruce with an interior ground cover of salal, salmonberry, elderberry and in some areas, moss, grasses and forbs. The perimeter of some of the large islands and some of the smaller vegetated islets, are covered with dense growths of salmonberry and other shrubs. Other islets are mostly bare rock with small areas of lush grass and forbs.

The shorelines of most of the islands are comprised of steep rock dissected by gorges and crevices. Areas with shelving rock and boulders are used by Harbour seals as haul-out sites.


The Ecological Reserve supports over one million seabirds and is the second largest seabird nesting site on the west coast of Canada (the Scott Islands are the largest). It contains the largest colony of Rhinoceros Auklets in Canada and the largest colony of Leach’s Storm-Petrels and Fork-tailed Storm-Petrels in British Columbia.Approximately 161,600 pairs of Rhinocerous Auklets have been estimated on Pine and Storm Islands. This represents approximately 26% of the global and as much as 45% of the national population. Large numbers of storm-petrels also nest on the Reserve, including 60,000 Fork-tailed Storm-Petrels (2.4% of the global, and 32% of the national population). An even larger population of Leach’s Storm Petrels (276,600 pairs – over 3% of the global, almost 10% of the eastern Pacific, and 50% of the western Canada population) nest on all the islands except Naiad Islets and Pine Island. Small colonies of Cassin’s Auklets (6,710 pairs) also occur among the other burrow-nesting seabirds (mostly on the Buckle Group) but not in nationally significant numbers. In addition, all of the islands except Pine support nesting Black Oystercatchers, with 23 pairs being present. This represents over 2% of the Canadian Black Oystercatcher population. Pigeon Guillemots also occur around all of the islands, with nearly 3% of the national population being present.

Large numbers of Glaucous-winged Gulls are also present (275 pairs) and Bald Eagles nest on most of the islands. The surrounding marine waters are also important for migrating Red-necked Phalaropes. Flocks of thousands feed on tide lines during July and August.

Summary of bird records available for Duke of Edinburgh Ecological Reserve
Click here to view all records
Species Season Number Unit Date
Black Oystercatcher BR 23 N P 1985
Cassin’s Auklet BR 6,710 N P 1985
Colonial Waterbirds/Seabirds BR 505,464 G P 1985
Fork-tailed Storm-Petrel BR 60,000 G P 1985
Glaucous-winged Gull BR 275 N P 1985
Leach’s Storm-Petrel (E. Pacific) BR 276,600 G P 1985
Pigeon Guillemot BR 279 N I 1985
Red-necked Phalarope FM 1,000 I 1985
Rhinoceros Auklet BR 161,600 G P 1985
Note: species shown in bold indicate that their population level (as estimated by the maximum number) exceeds at least one of the IBA thresholds (national, continental or global). The site may still not qualify for that level of IBA if the maximum number reflects an exceptional or historical occurence.
Conservation Issues

Pine and Storm Islands, Tree, Naid, and Reid Islets, and the Buckle Group are all part of the Duke of Edinburgh Ecological Reserve. The reserve was designated by the province of British Columbia in 1988, and as such, most major disturbances and threats are managed. Potential oil spills, general environmental contamination, and disturbance from boaters, however, are still a concern.