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Location Canada, British Columbia
Central coordinates 132o 24.67' West  52o 57.65' North
IBA criteria A4ii, A4iii
Area 300 ha
Altitude 0 - 120m
Year of IBA assessment 2008

Bird Studies Canada/Nature Canada

Site description Englefield Bay is situated on the northwest coast of Moresby Island, at the mouths of Moore and Inskip channels. Two clusters of islands within the bay support nesting seabirds: to the north, Saunders, Helgesen, Willie, Carswell, Lihou islands and Bone Point; and to the south, Luxmoore and Rogers islands, Moresby Islets, and Cape Kuper. These islands support the only major nesting concentration of seabirds along this section of rugged coastline.

The larger islands are forested with a mix of sitka spruce, western hemlock and western red cedar. The smaller islands support spruce and some hemlock, with more extensive areas of forbes and grasses than the larger islands. The three largest islands in the group, Helgesen (54 ha), Lihou (75 ha) and Saunders (55 ha) are rugged and precipitous, bound by cliffs and deeply dissected by gorges and crevices that effectively divide the islands into segments.

Key Biodiversity The islands in Englefield Bay support significant populations of nesting seabirds. At least two species were present in globally significant numbers during surveys completed in 1986: Rhinoceros Auklets (3.2% of the global and 5.5% of the national population) and Ancient Murrelets, (3.7% of the global and 7% of the national population). Ancient Murrelets have been designated as a Nationally Vulnerable species. Cassin?s Auklets and Pigeon Guillemots are also present in numbers just over 1% of their estimated national populations.

Although separate estimates for nesting Fork-tailed and Leach?s Storm-Petrel were not obtained during the 1986 surveys, the combined estimate of 48,550 pairs is likely of continental significance for Fork-tailed Storm-Petrel and of national significance for the eastern Pacific Leach?s Storm-Petrel population. In addition, nesting Black Oystercatchers are present in numbers approaching national significance. Other species of seabirds nesting there include Pelagic Cormorants, Glaucous-winged Gulls and Tufted Puffins. Bald Eagles nest on most of the islands, and Peregrine Falcons (ssp. pealei) are in the area.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Fork-tailed Storm-petrel Hydrobates furcatus breeding  1986  24,275 breeding pairs  A4ii  Least Concern 
Ancient Murrelet Synthliboramphus antiquus breeding  1986  18,670 breeding pairs  A4ii  Least Concern 
Cassin's Auklet Ptychoramphus aleuticus breeding  1986  15,870 breeding pairs  A4ii  Near Threatened 
Rhinoceros Auklet Cerorhinca monocerata breeding  1986  19,670 breeding pairs  A4ii  Least Concern 
A4iii Species group - seabirds breeding  100,000-499,999 breeding pairs  unknown  A4iii   


IUCN habitat Habitat detail Extent (% of site)
Forest Temperate coniferous forest  -
Shrubland Scrub  -

Land use

Land-use Extent (% of site)
not utilised -

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Englefield Bay Islands. Downloaded from on 21/10/2016

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