South Thormanby Island

Tattenham Ledge, a long shallow underwater shelf of rock, extends from the northern side of the island and is a hazard to navigation.

The grand fir/three-leaved foamflower ecological community, also on the provincial red-list, is found in parts of the north island.

[7][8] Additionally, a unique sand plain and salt marsh is found on the south island at Gill Beach.

Both water birds and migratory songbirds heavily depend on these habitats for seasonal and year-round nesting, foraging, and refuge during storms and weather events.

Other common tree species include Western hemlock, red alder, arbutus, lodgepole pine, and bigleaf maple.

There have also been beavers inhabiting the lake and, in recent memory, black bear and cougar have been sighted on the island, though they are not believed to be presently established.

[11] Spanish naval officer José María Narváez was the first European to visit the islands, which he named "Isla de San Ignacio," on July 12, 1791.

For example, the name Buccaneer Bay honours another race horse who won the Royal Hunt Cup at Ascot in 1861[13][14] In 1892, rights to the majority of land on the island was secured by Calvert Simson, a shopkeeper of the Hastings Mill Store in Gastown, through a crown grant.

[15] During the 1920s and 1930s, the Union Steamship Company constructed a float in Buccaneer Bay and made regular trips to the island from Vancouver.